Power control for wireless device cooperative transmission schemes

ABSTRACT

Generally, the described techniques provide for efficiently transmitting uplink signals to a base station using shared antennas associated with different power classes. A first device may be in communications with a base station using local antennas and may identify a second device having auxiliary antennas available for transmitting uplink signals to the base station. The local and auxiliary antennas may be associated with different power classes, and the first device may transmit a message to a base station indicating that the first device is capable of transmitting using antennas associated with different power classes. The first device may then receive configurations from a base station of different transmit powers to transmit on the antennas associated with the different power classes, and the first device may transmit uplink signals to the base station in accordance with the different transmit power configurations.

CROSS REFERENCE

The present Application for patent claims the benefit of U.S.Provisional Patent Application No. 62/932,348 by HUANG et al., entitled“POWER CONTROL FOR WIRELESS DEVICE COOPERATIVE TRANSMISSION SCHEMES,”filed Nov. 7, 2019, assigned to the assignee hereof, and expresslyincorporated by reference herein.

BACKGROUND

The following relates generally to wireless communications and morespecifically to power control for wireless device cooperativetransmission schemes.

Wireless communications systems are widely deployed to provide varioustypes of communication content such as voice, video, packet data,messaging, broadcast, and so on. These systems may be capable ofsupporting communication with multiple users by sharing the availablesystem resources (e.g., time, frequency, and power). Examples of suchmultiple-access systems include fourth generation (4G) systems such asLong-Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, orLTE-A Pro systems, and fifth generation (5G) systems which may bereferred to as New Radio (NR) systems. These systems may employtechnologies such as code division multiple access (CDMA), time divisionmultiple access (TDMA), frequency division multiple access (FDMA),orthogonal frequency division multiple access (OFDMA), or discreteFourier transform spread orthogonal frequency division multiplexing(DFT-S-OFDM).

A wireless multiple-access communications system may include a number ofbase stations or network access nodes, each simultaneously supportingcommunication for multiple communication devices, which may be otherwiseknown as user equipments (UEs). In some wireless communications systems,an extended reality (XR) device (or other device) may connect to anotherdevice, such as a UE, using one of a number of tether options, includinga universal serial bus (USB) link, a Bluetooth link, a Wi-Fi link, a 5Gsidelink, etc. In such systems, it may be appropriate for both devicesto communicate with a base station while the devices are connected toeach other. Improved techniques for facilitating communications betweenconnected devices and a base station may be desirable.

SUMMARY

The described techniques relate to improved methods, systems, devices,and apparatuses that support power control for wireless devicecooperative transmission schemes. Generally, the described techniquesprovide for efficiently transmitting uplink signals to a base stationusing shared antennas associated with different power classes. A firstdevice may be in communication with a base station using local antennasand may identify a second device having auxiliary antennas available fortransmitting uplink signals to the base station. The first device maydetermine that the auxiliary antennas are associated with a differentpower class than the local antennas, and the first device may transmit amessage to the base station indicating that the first device is capableof transmitting using antennas associated with different power classes.The first device may then receive configurations from a base station ofdifferent transmit powers to transmit on the antennas associated withthe different power classes, and the first device may transmit uplinksignals to the base station in accordance with the different transmitpower configurations.

A method of wireless communication at a first device is described. Themethod may include communicating with a base station over a firstcommunication link using a set of local antennas associated with a firstpower class, identifying a set of auxiliary antennas of a second deviceassociated with a second power class for transmitting uplink signals tothe base station, where the first device is in communication with thesecond device over a second communication link, transmitting, based onidentifying the set of auxiliary antennas of the second device, anindication of the second power class for the set of auxiliary antennasto the base station, identifying uplink signals to transmit to the basestation using at least one antenna of the set of local antennas of thefirst device associated with the first power class or of the set ofauxiliary antennas of the second device associated with the second powerclass, and transmitting the uplink signals to the base station via theat least one antenna.

An apparatus for wireless communication at a first device is described.The apparatus may include a processor, memory coupled with theprocessor, and instructions stored in the memory. The instructions maybe executable by the processor to cause the apparatus to communicatewith a base station over a first communication link using a set of localantennas associated with a first power class, identify a set ofauxiliary antennas of a second device associated with a second powerclass for transmitting uplink signals to the base station, where thefirst device is in communication with the second device over a secondcommunication link, transmit, based on identifying the set of auxiliaryantennas of the second device, an indication of the second power classfor the set of auxiliary antennas to the base station, identify uplinksignals to transmit to the base station using at least one antenna ofthe set of local antennas of the first device associated with the firstpower class or of the set of auxiliary antennas of the second deviceassociated with the second power class, and transmit the uplink signalsto the base station via the at least one antenna.

Another apparatus for wireless communication at a first device isdescribed. The apparatus may include means for communicating with a basestation over a first communication link using a set of local antennasassociated with a first power class, identifying a set of auxiliaryantennas of a second device associated with a second power class fortransmitting uplink signals to the base station, where the first deviceis in communication with the second device over a second communicationlink, transmitting, based on identifying the set of auxiliary antennasof the second device, an indication of the second power class for theset of auxiliary antennas to the base station, identifying uplinksignals to transmit to the base station using at least one antenna ofthe set of local antennas of the first device associated with the firstpower class or of the set of auxiliary antennas of the second deviceassociated with the second power class, and transmitting the uplinksignals to the base station via the at least one antenna.

A non-transitory computer-readable medium storing code for wirelesscommunication at a first device is described. The code may includeinstructions executable by a processor to communicate with a basestation over a first communication link using a set of local antennasassociated with a first power class, identify a set of auxiliaryantennas of a second device associated with a second power class fortransmitting uplink signals to the base station, where the first deviceis in communication with the second device over a second communicationlink, transmit, based on identifying the set of auxiliary antennas ofthe second device, an indication of the second power class for the setof auxiliary antennas to the base station, identify uplink signals totransmit to the base station using at least one antenna of the set oflocal antennas of the first device associated with the first power classor of the set of auxiliary antennas of the second device associated withthe second power class, and transmit the uplink signals to the basestation via the at least one antenna.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving, from thebase station, a first power control command associated with transmittingthe uplink signals via the set of local antennas of the first device anda second power control command associated with transmitting the uplinksignals via the set of auxiliary antennas of the second device. In someexamples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, transmitting the uplinksignals may include operations, features, means, or instructions fortransmitting a first component signal of the uplink signals to the basestation via the at least one antenna of the set of local antennas of thefirst device based on a first power control loop associated with the setof local antennas of the first device and the first power controlcommand, and transmitting a second component signal of the uplinksignals to the base station via the at least one antenna of the set ofauxiliary antennas of the second device based on a second power controlloop associated with the set of auxiliary antennas of the second deviceand the second power control command.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting, to thesecond device over the second communication link, a control messageindicating a transmit power for transmitting the uplink signals via theset of auxiliary antennas of the second device. In some examples of themethod, apparatuses, and non-transitory computer-readable mediumdescribed herein, transmitting the uplink signals via the at least oneantenna of the set of auxiliary antennas of the second device mayinclude operations, features, means, or instructions for sendingin-phase and quadrature samples of the uplink signals to the seconddevice for transmission to the base station via the at least one antennaof the set of auxiliary antennas of the second device. In some examplesof the method, apparatuses, and non-transitory computer-readable mediumdescribed herein, the in-phase and quadrature samples may be compressed.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first power class may beapplied to antenna ports of the first device associated with the set oflocal antennas, and the second power class may be applied to antennaports of the second device associated with the set of auxiliaryantennas. In some examples of the method, apparatuses, andnon-transitory computer-readable medium described herein, the firstpower class may be applied to a first set of carriers allocated foruplink transmissions from the first device using the set of localantennas, and the second power class may be applied to a second set ofcarriers allocated for uplink transmissions from the second device usingthe set of auxiliary antennas. Some examples of the method, apparatuses,and non-transitory computer-readable medium described herein may furtherinclude operations, features, means, or instructions for receiving RRCsignaling indicating a first maximum power reduction and a first maximumallowed power (P_(EMAX)) associated with the first power class and asecond maximum power reduction and a second maximum allowed power(P_(EMAX)) associated with the second power class.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first device may becapable of supporting a set of power classes including the first powerclass and the second power class. In some examples of the method,apparatuses, and non-transitory computer-readable medium describedherein, the second communication link includes a universal serial bus(USB) link, a Bluetooth link, a Wi-Fi link, or a sidelink. In someexamples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first device may be a UE,a head mounted display, or a wearable device, and the second device maybe a UE, a head mounted display, or a wearable device, where the headmounted display includes an extended reality head mounted display, anaugmented reality head mounted display, or a virtual reality headmounted display.

A method of wireless communication at a base station is described. Themethod may include communicating with a first device over a firstcommunication link, the first device using a set of local antennasassociated with a first power class, receiving, from the first device,an indication of a second power class associated with a set of auxiliaryantennas of a second device, where the first device is in communicationwith the second device over a second communication link, transmitting,to the first device, a control message indicating a first power foruplink transmissions via the set of local antennas of the first deviceand a second power for uplink transmissions via the set of auxiliaryantennas of the second device, and receiving first uplink signals fromthe first device transmitted with the first power and second uplinksignals from the second device transmitted with the second power basedon the transmitting.

An apparatus for wireless communication at a base station is described.The apparatus may include a processor, memory coupled with theprocessor, and instructions stored in the memory. The instructions maybe executable by the processor to cause the apparatus to communicatewith a first device over a first communication link, the first deviceusing a set of local antennas associated with a first power class,receive, from the first device, an indication of a second power classassociated with a set of auxiliary antennas of a second device, wherethe first device is in communication with the second device over asecond communication link, transmit, to the first device, a controlmessage indicating a first power for uplink transmissions via the set oflocal antennas of the first device and a second power for uplinktransmissions via the set of auxiliary antennas of the second device,and receive first uplink signals from the first device transmitted withthe first power and second uplink signals from the second devicetransmitted with the second power based on the transmitting.

Another apparatus for wireless communication at a base station isdescribed. The apparatus may include means for communicating with afirst device over a first communication link, the first device using aset of local antennas associated with a first power class, receiving,from the first device, an indication of a second power class associatedwith a set of auxiliary antennas of a second device, where the firstdevice is in communication with the second device over a secondcommunication link, transmitting, to the first device, a control messageindicating a first power for uplink transmissions via the set of localantennas of the first device and a second power for uplink transmissionsvia the set of auxiliary antennas of the second device, and receivingfirst uplink signals from the first device transmitted with the firstpower and second uplink signals from the second device transmitted withthe second power based on the transmitting.

A non-transitory computer-readable medium storing code for wirelesscommunication at a base station is described. The code may includeinstructions executable by a processor to communicate with a firstdevice over a first communication link, the first device using a set oflocal antennas associated with a first power class, receive, from thefirst device, an indication of a second power class associated with aset of auxiliary antennas of a second device, where the first device isin communication with the second device over a second communicationlink, transmit, to the first device, a control message indicating afirst power for uplink transmissions via the set of local antennas ofthe first device and a second power for uplink transmissions via the setof auxiliary antennas of the second device, and receive first uplinksignals from the first device transmitted with the first power andsecond uplink signals from the second device transmitted with the secondpower based on the transmitting.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first power class may beapplied to antenna ports of the first device associated with the set oflocal antennas, and the second power class may be applied to antennaports of the second device associated with the set of auxiliaryantennas. Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for identifying a firstantenna port index associated with the first uplink signals and a secondantenna port index associated with the second uplink signals, anddetermining that the first uplink signals may be from the first devicebased on the first antenna port index and the second uplink signals maybe from the second device based on the second antenna port index.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first power class may beapplied to a first set of carriers allocated for uplink transmissionsfrom the first device using the set of local antennas, and the secondpower class may be applied to a second set of carriers allocated foruplink transmissions from the second device using the set of auxiliaryantennas. Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for identifying that thefirst uplink signals may be received on the first set of carriers andthe second uplink signals may be received on the second set of carriers,and determining that the first uplink signals may be from the firstdevice based on the first uplink signals being received on the first setof carriers and the second uplink signals may be from the second devicebased on the second uplink signals being received on the second set ofcarriers.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting RRCsignaling indicating a first maximum power reduction and a first maximumallowed power (P_(EMAX)) associated with the first power class and asecond maximum power reduction and a second maximum allowed power(P_(EMAX)) associated with the second power class. In some examples ofthe method, apparatuses, and non-transitory computer-readable mediumdescribed herein, the first device may be capable of supporting a set ofpower classes including the first power class and the second powerclass. In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the second communication linkincludes a USB link, a Bluetooth link, a Wi-Fi link, or a sidelink. Insome examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first device may be a UE,a head mounted display, or a wearable device, and the second device maybe a UE, a head mounted display, or a wearable device, where the headmounted display includes an extended reality head mounted display, anaugmented reality head mounted display, or a virtual reality headmounted display.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates an example of a wireless communications system thatsupports power control for wireless device cooperative transmissionschemes in accordance with aspects of the present disclosure.

FIG. 2 illustrates an example of AR and VR devices categorized assmartphones or standalone devices in accordance with aspects of thepresent disclosure.

FIG. 3 illustrates an example of antenna sharing in accordance withaspects of the present disclosure.

FIG. 4 illustrates an example of a wireless communications system thatsupports power control for wireless device cooperative transmissionschemes in accordance with aspects of the present disclosure.

FIG. 5 illustrates an example of a process flow that supports powercontrol for wireless device cooperative transmission schemes inaccordance with aspects of the present disclosure.

FIGS. 6 and 7 show block diagrams of devices that support power controlfor wireless device cooperative transmission schemes in accordance withaspects of the present disclosure.

FIG. 8 shows a block diagram of a communications manager that supportspower control for wireless device cooperative transmission schemes inaccordance with aspects of the present disclosure.

FIG. 9 shows a diagram of a system including a device that supportspower control for wireless device cooperative transmission schemes inaccordance with aspects of the present disclosure.

FIGS. 10 and 11 show block diagrams of devices that support powercontrol for wireless device cooperative transmission schemes inaccordance with aspects of the present disclosure.

FIG. 12 shows a block diagram of a communications manager that supportspower control for wireless device cooperative transmission schemes inaccordance with aspects of the present disclosure.

FIG. 13 shows a diagram of a system including a device that supportspower control for wireless device cooperative transmission schemes inaccordance with aspects of the present disclosure.

FIGS. 14 and 15 show flowcharts illustrating methods that support powercontrol for wireless device cooperative transmission schemes inaccordance with aspects of the present disclosure.

DETAILED DESCRIPTION

In some wireless communications systems, a user equipment (UE) may beconnected to a base station, and an extended reality (XR) device may bein communication with (e.g., tethered) to the UE. In such systems, theUE may be configured to generate and transmit uplink signals to the basestation via one or more local antennas (e.g., physical antennas at theUE) and via one or more auxiliary antennas (e.g., physical antennas atthe XR device). Alternatively, if the XR device has a modem, the XRdevice may be configured to generate and transmit uplink signals to thebase station via one or more local antennas (e.g., physical antennas atthe XR device) and via one or more auxiliary antennas (e.g., physicalantennas at the UE). Thus, in wireless communications systems describedherein, a first device may be configured to transmit uplink signals viaone or more local antennas at the first device and one or more auxiliaryantennas at a second device (e.g., to improve throughput).

In some cases, however, the local antennas at the first device and theauxiliary antennas at the second device may be associated with differentpower classes, and the first device may be limited to a single powerclass for transmissions to a base station. For example, the first devicemay receive a single configuration for a transmit power for transmittinguplink signals to a base station using local antennas and auxiliaryantennas. In such cases, if the first device is capable of transmittingat a higher power than the second device (e.g., if the first device haspower amplifiers with higher power output than power amplifiers of thesecond device), transmissions from the first and second devicesaccording to a single configuration may result in loss of throughput.For example, if the single configuration for the transmit power isdetermined based on the capabilities of the first device, the power oftransmissions from the auxiliary antennas may be unexpectedly lowresulting in distorted uplink signals and loss of throughput.Alternatively, if the single configuration for the transmit power isdetermined based on the capabilities of the second device, the power oftransmissions from the local antennas may be lower than a supportedpower, and the first device may not take advantage of the full capacityof the local antennas resulting in loss of throughput.

As described herein, wireless devices may support efficient techniquesfor transmitting uplink signals to a base station using shared antennasassociated with different power classes. In particular, a first devicemay be configured to transmit on local antennas using a first transmitpower and on auxiliary antennas using a second transmit power (e.g.,where the power used to transmit on a particular set of antennas may bebased on the power classes associated with that set of antennas). Oncethe first device identifies auxiliary antennas and determines that theauxiliary antennas are associated with a different power class than thelocal antennas, the first device may transmit a message (e.g., acapability indication) to a base station indicating that the firstdevice is capable of transmitting using antennas associated withdifferent power classes. The first device may then receiveconfigurations from the base station of different transmit powers totransmit on the antennas associated with the different power classes,and the first device may transmit uplink signals to the base station inaccordance with the different transmit power configurations.

Aspects of the disclosure introduced above are initially described inthe context of a wireless communications system. Examples of processesand signaling exchanges that support power control for wireless devicecooperative transmission schemes are then described. Aspects of thedisclosure are further illustrated by and described with reference toapparatus diagrams, system diagrams, and flowcharts that relate to powercontrol for wireless device cooperative transmission schemes.

FIG. 1 illustrates an example of a wireless communications system 100that supports power control for wireless device cooperative transmissionschemes in accordance with aspects of the present disclosure. Thewireless communications system 100 includes base stations 105, UEs 115,wireless devices 120, and a core network 130. In some examples, thewireless communications system 100 may be a Long-Term Evolution (LTE)network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, or a NewRadio (NR) network. In some cases, wireless communications system 100may support enhanced broadband communications, ultra-reliable (e.g.,mission critical) communications, low latency communications, orcommunications with low-cost and low-complexity devices.

Base stations 105 may wirelessly communicate with UEs 115 or wirelessdevices 120 via one or more base station antennas. Base stations 105described herein may include or may be referred to by those skilled inthe art as a base transceiver station, a radio base station, an accesspoint, a radio transceiver, a NodeB, an eNodeB (eNB), a next-generationNodeB or giga-NodeB (either of which may be referred to as a gNB), aHome NodeB, a Home eNodeB, or some other suitable terminology. Wirelesscommunications system 100 may include base stations 105 of differenttypes (e.g., macro or small cell base stations). The UEs 115 andwireless devices 120 described herein may be able to communicate withvarious types of base stations 105 and network equipment including macroeNBs, small cell eNBs, gNBs, relay base stations, and the like.

Each base station 105 may be associated with a particular geographiccoverage area 110 in which communications with various UEs 115 andwireless devices 120 is supported. Each base station 105 may providecommunication coverage for a respective geographic coverage area 110 viacommunication links 125, and communication links 125 between a basestation 105 and a UE 115 may utilize one or more carriers. Communicationlinks 125 shown in wireless communications system 100 may include uplinktransmissions from a UE 115 or wireless device 120 to a base station 105or downlink transmissions from a base station 105 to a UE 115 orwireless device 120. Downlink transmissions may also be called forwardlink transmissions while uplink transmissions may also be called reverselink transmissions.

The geographic coverage area 110 for a base station 105 may be dividedinto sectors making up a portion of the geographic coverage area 110,and each sector may be associated with a cell. For example, each basestation 105 may provide communication coverage for a macro cell, a smallcell, a hot spot, or other types of cells, or various combinationsthereof. In some examples, a base station 105 may be movable andtherefore provide communication coverage for a moving geographiccoverage area 110. In some examples, different geographic coverage areas110 associated with different technologies may overlap, and overlappinggeographic coverage areas 110 associated with different technologies maybe supported by the same base station 105 or by different base stations105. The wireless communications system 100 may include, for example, aheterogeneous LTE/LTE-A/LTE-A Pro or NR network in which different typesof base stations 105 provide coverage for various geographic coverageareas 110.

The term “cell” may refer to a logical communication entity used forcommunication with a base station 105 (e.g., over a carrier), and may beassociated with an identifier for distinguishing neighboring cells(e.g., a physical cell identifier (PCID), a virtual cell identifier(VCID)) operating via the same or a different carrier. In some examples,a carrier may support multiple cells, and different cells may beconfigured according to different protocol types (e.g., machine-typecommunication (MTC), narrowband Internet-of-Things (NB-IoT), enhancedmobile broadband (eMBB), or others) that may provide access fordifferent types of devices. In some cases, the term “cell” may refer toa portion of a geographic coverage area 110 (e.g., a sector) over whichthe logical entity operates.

The term “carrier” refers to a set of radio frequency spectrum resourceshaving a defined physical layer structure for supporting communicationsover a communication link 125. For example, a carrier of a communicationlink 125 may include a portion of a radio frequency spectrum band thatis operated according to physical layer channels for a given radioaccess technology. Each physical layer channel may carry user data,control information, or other signaling. A carrier may be associatedwith a pre-defined frequency channel (e.g., an evolved universal mobiletelecommunication system terrestrial radio access (E-UTRA) absoluteradio frequency channel number (EARFCN)) and may be positioned accordingto a channel raster for discovery by UEs 115. Carriers may be downlinkor uplink (e.g., in an FDD mode), or be configured to carry downlink anduplink communications (e.g., in a TDD mode). In some examples, signalwaveforms transmitted over a carrier may be made up of multiplesub-carriers (e.g., using multi-carrier modulation (MCM) techniques suchas orthogonal frequency division multiplexing (OFDM) or discrete Fouriertransform spread OFDM (DFT-S-OFDM)).

UEs 115 or wireless devices 120 may be dispersed throughout the wirelesscommunications system 100, and each UE 115 or wireless device 120 may bestationary or mobile. A UE 115 may also be referred to as a mobiledevice, a wireless device (i.e., a wireless device 120 may be an exampleof a UE 115), a remote device, a handheld device, or a subscriberdevice, or some other suitable terminology, where the “device” may alsobe referred to as a unit, a station, a terminal, or a client. A UE 115may also be a personal electronic device such as a cellular phone, apersonal digital assistant (PDA), a tablet computer, a laptop computer,or a personal computer. In some examples, a UE 115 may also refer to awireless local loop (WLL) station, an Internet of Things (IoT) device,an Internet of Everything (IoE) device, or an MTC device, or the like,which may be implemented in various articles such as appliances,vehicles, meters, or the like.

Some UEs 115, such as MTC or IoT devices, may be low cost or lowcomplexity devices, and may provide for automated communication betweenmachines (e.g., via Machine-to-Machine (M2M) communication). M2Mcommunication or MTC may refer to data communication technologies thatallow devices to communicate with one another or a base station 105without human intervention. In some examples, M2M communication or MTCmay include communications from devices that integrate sensors or metersto measure or capture information and relay that information to acentral server or application program that can make use of theinformation or present the information to humans interacting with theprogram or application. Some UEs 115 may be designed to collectinformation or enable automated behavior of machines. Examples ofapplications for MTC devices include smart metering, inventorymonitoring, water level monitoring, equipment monitoring, healthcaremonitoring, wildlife monitoring, weather and geological eventmonitoring, fleet management and tracking, remote security sensing,physical access control, and transaction-based business charging.

Some UEs 115 may be configured to employ operating modes that reducepower consumption, such as half-duplex communications (e.g., a mode thatsupports one-way communication via transmission or reception, but nottransmission and reception simultaneously). In some examples half-duplexcommunications may be performed at a reduced peak rate. Other powerconservation techniques for UEs 115 include entering a power saving“deep sleep” mode when not engaging in active communications, oroperating over a limited bandwidth (e.g., according to narrowbandcommunications). In some cases, UEs 115 may be designed to supportcritical functions (e.g., mission critical functions), and a wirelesscommunications system 100 may be configured to provide ultra-reliablecommunications for these functions.

In some cases, a UE 115 may also be able to communicate directly withother UEs 115 (e.g., using a peer-to-peer (P2P) or device-to-device(D2D) protocol). One or more of a group of UEs 115 utilizing D2Dcommunications may be within the geographic coverage area 110 of a basestation 105. Other UEs 115 in such a group may be outside the geographiccoverage area 110 of a base station 105 or be otherwise unable toreceive transmissions from a base station 105. In some cases, groups ofUEs 115 communicating via D2D communications may utilize a one-to-many(1:M) system in which each UE 115 transmits to every other UE 115 in thegroup. In some cases, a base station 105 facilitates the scheduling ofresources for D2D communications. In other cases, D2D communications arecarried out between UEs 115 without the involvement of a base station105.

Base stations 105 may communicate with the core network 130 and with oneanother. For example, base stations 105 may interface with the corenetwork 130 through backhaul links 132 (e.g., via an S1, N2, N3, orother interface). Base stations 105 may communicate with one anotherover backhaul links 134 (e.g., via an X2, Xn, or other interface) eitherdirectly (e.g., directly between base stations 105) or indirectly (e.g.,via core network 130).

The core network 130 may provide user authentication, accessauthorization, tracking, Internet Protocol (IP) connectivity, and otheraccess, routing, or mobility functions. The core network 130 may be anevolved packet core (EPC), which may include at least one mobilitymanagement entity (MME), at least one serving gateway (S-GW), and atleast one Packet Data Network (PDN) gateway (P-GW). The MME may managenon-access stratum (e.g., control plane) functions such as mobility,authentication, and bearer management for UEs 115 served by basestations 105 associated with the EPC. User IP packets may be transferredthrough the S-GW, which itself may be connected to the P-GW. The P-GWmay provide IP address allocation as well as other functions. The P-GWmay be connected to the network operators IP services. The operators IPservices may include access to the Internet, Intranet(s), an IPMultimedia Subsystem (IMS), or a Packet-Switched (PS) Streaming Service.

At least some of the network devices, such as a base station 105, mayinclude subcomponents such as an access network entity, which may be anexample of an access node controller (ANC). Each access network entitymay communicate with UEs 115 through a number of other access networktransmission entities, which may be referred to as a radio head, a smartradio head, or a transmission/reception point (TRP). In someconfigurations, various functions of each access network entity or basestation 105 may be distributed across various network devices (e.g.,radio heads and access network controllers) or consolidated into asingle network device (e.g., a base station 105).

Wireless communications system 100 may operate using one or morefrequency bands, typically in the range of 300 megahertz (MHz) to 300gigahertz (GHz). Generally, the region from 300 MHz to 3 GHz is known asthe ultra-high frequency (UHF) region or decimeter band, since thewavelengths range from approximately one decimeter to one meter inlength. UHF waves may be blocked or redirected by buildings andenvironmental features. However, the waves may penetrate structuressufficiently for a macro cell to provide service to UEs 115 locatedindoors. Transmission of UHF waves may be associated with smallerantennas and shorter range (e.g., less than 100 km) compared totransmission using the smaller frequencies and longer waves of the highfrequency (HF) or very high frequency (VHF) portion of the spectrumbelow 300 MHz. Wireless communications system 100 may also operate in asuper high frequency (SHF) region using frequency bands from 3 GHz to 30GHz, also known as the centimeter band. The SHF region includes bandssuch as the 5 GHz industrial, scientific, and medical (ISM) bands, whichmay be used opportunistically by devices that may be capable oftolerating interference from other users.

Wireless communications system 100 may also operate in an extremely highfrequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz),also known as the millimeter band. In some examples, wirelesscommunications system 100 may support millimeter wave (mmW)communications between UEs 115 and base stations 105, and EHF antennasof the respective devices may be even smaller and more closely spacedthan UHF antennas. In some cases, this may facilitate use of antennaarrays within a UE 115. However, the propagation of EHF transmissionsmay be subject to even greater atmospheric attenuation and shorter rangethan SHF or UHF transmissions. Techniques disclosed herein may beemployed across transmissions that use one or more different frequencyregions, and designated use of bands across these frequency regions maydiffer by country or regulating body.

In some cases, wireless communications system 100 may utilize bothlicensed and unlicensed radio frequency spectrum bands. For example,wireless communications system 100 may employ License Assisted Access(LAA), LTE-Unlicensed (LTE-U) radio access technology, or NR technologyin an unlicensed band such as the 5 GHz ISM band. When operating inunlicensed radio frequency spectrum bands, wireless devices such as basestations 105 and UEs 115 may employ listen-before-talk (LBT) proceduresto ensure a frequency channel is clear before transmitting data. In somecases, operations in unlicensed bands may be based on a carrieraggregation configuration in conjunction with component carriersoperating in a licensed band (e.g., LAA). Operations in unlicensedspectrum may include downlink transmissions, uplink transmissions,peer-to-peer transmissions, or a combination of these. Duplexing inunlicensed spectrum may be based on frequency division duplexing (FDD),time division duplexing (TDD), or a combination of both.

In some examples, base station 105 or UE 115 may be equipped withmultiple antennas, which may be used to employ techniques such astransmit diversity, receive diversity, multiple-input multiple-output(MIMO) communications, or beamforming. For example, wirelesscommunications system 100 may use a transmission scheme between atransmitting device (e.g., a base station 105) and a receiving device(e.g., a UE 115), where the transmitting device is equipped withmultiple antennas and the receiving device is equipped with one or moreantennas. MIMO communications may employ multipath signal propagation toincrease the spectral efficiency by transmitting or receiving multiplesignals via different spatial layers, which may be referred to asspatial multiplexing. The multiple signals may, for example, betransmitted by the transmitting device via different antennas ordifferent combinations of antennas. Likewise, the multiple signals maybe received by the receiving device via different antennas or differentcombinations of antennas. Each of the multiple signals may be referredto as a separate spatial stream and may carry bits associated with thesame data stream (e.g., the same codeword) or different data streams.Different spatial layers may be associated with different antenna portsused for channel measurement and reporting. MIMO techniques includesingle-user MIMO (SU-MIMO) where multiple spatial layers are transmittedto the same receiving device, and multiple-user MIMO (MU-MIMO) wheremultiple spatial layers are transmitted to multiple devices.

Beamforming, which may also be referred to as spatial filtering,directional transmission, or directional reception, is a signalprocessing technique that may be used at a transmitting device or areceiving device (e.g., a base station 105 or a UE 115) to shape orsteer an antenna beam (e.g., a transmit beam or receive beam) along aspatial path between the transmitting device and the receiving device.Beamforming may be achieved by combining the signals communicated viaantenna elements of an antenna array such that signals propagating atparticular orientations with respect to an antenna array experienceconstructive interference while others experience destructiveinterference. The adjustment of signals communicated via the antennaelements may include a transmitting device or a receiving deviceapplying certain amplitude and phase offsets to signals carried via eachof the antenna elements associated with the device. The adjustmentsassociated with each of the antenna elements may be defined by abeamforming weight set associated with a particular orientation (e.g.,with respect to the antenna array of the transmitting device orreceiving device, or with respect to some other orientation).

In one example, a base station 105 may use multiple antennas or antennaarrays to conduct beamforming operations for directional communicationswith a UE 115. For instance, some signals (e.g. synchronization signals,reference signals, beam selection signals, or other control signals) maybe transmitted by a base station 105 multiple times in differentdirections, which may include a signal being transmitted according todifferent beamforming weight sets associated with different directionsof transmission. Transmissions in different beam directions may be usedto identify (e.g., by the base station 105 or a receiving device, suchas a UE 115) a beam direction for subsequent transmission and/orreception by the base station 105.

Some signals, such as data signals associated with a particularreceiving device, may be transmitted by a base station 105 in a singlebeam direction (e.g., a direction associated with the receiving device,such as a UE 115). In some examples, the beam direction associated withtransmissions along a single beam direction may be determined based atleast in in part on a signal that was transmitted in different beamdirections. For example, a UE 115 may receive one or more of the signalstransmitted by the base station 105 in different directions, and the UE115 may report to the base station 105 an indication of the signal itreceived with a highest signal quality, or an otherwise acceptablesignal quality. Although these techniques are described with referenceto signals transmitted in one or more directions by a base station 105,a UE 115 may employ similar techniques for transmitting signals multipletimes in different directions (e.g., for identifying a beam directionfor subsequent transmission or reception by the UE 115), or transmittinga signal in a single direction (e.g., for transmitting data to areceiving device).

A receiving device (e.g., a UE 115, which may be an example of a mmWreceiving device) may try multiple receive beams when receiving varioussignals from the base station 105, such as synchronization signals,reference signals, beam selection signals, or other control signals. Forexample, a receiving device may try multiple receive directions byreceiving via different antenna subarrays, by processing receivedsignals according to different antenna subarrays, by receiving accordingto different receive beamforming weight sets applied to signals receivedat a plurality of antenna elements of an antenna array, or by processingreceived signals according to different receive beamforming weight setsapplied to signals received at a plurality of antenna elements of anantenna array, any of which may be referred to as “listening” accordingto different receive beams or receive directions. In some examples areceiving device may use a single receive beam to receive along a singlebeam direction (e.g., when receiving a data signal). The single receivebeam may be aligned in a beam direction determined based at least inpart on listening according to different receive beam directions (e.g.,a beam direction determined to have a highest signal strength, highestsignal-to-noise ratio, or otherwise acceptable signal quality based atleast in part on listening according to multiple beam directions).

In some cases, the antennas of a base station 105 or UE 115 may belocated within one or more antenna arrays, which may support MIMOoperations, or transmit or receive beamforming. For example, one or morebase station antennas or antenna arrays may be co-located at an antennaassembly, such as an antenna tower. In some cases, antennas or antennaarrays associated with a base station 105 may be located in diversegeographic locations. A base station 105 may have an antenna array witha number of rows and columns of antenna ports that the base station 105may use to support beamforming of communications with a UE 115.Likewise, a UE 115 may have one or more antenna arrays that may supportvarious MIMO or beamforming operations.

In some cases, wireless communications system 100 may be a packet-basednetwork that operates according to a layered protocol stack. In the userplane, communications at the bearer or Packet Data Convergence Protocol(PDCP) layer may be IP-based. A Radio Link Control (RLC) layer mayperform packet segmentation and reassembly to communicate over logicalchannels. A Medium Access Control (MAC) layer may perform priorityhandling and multiplexing of logical channels into transport channels.The MAC layer may also use hybrid automatic repeat request (HARQ) toprovide retransmission at the MAC layer to improve link efficiency. Inthe control plane, the Radio Resource Control (RRC) protocol layer mayprovide establishment, configuration, and maintenance of an RRCconnection between a UE 115 and a base station 105 or core network 130supporting radio bearers for user plane data. At the Physical layer,transport channels may be mapped to physical channels.

In some cases, UEs 115 and base stations 105 may support retransmissionsof data to increase the likelihood that data is received successfully.HARQ feedback is one technique of increasing the likelihood that data isreceived correctly over a communication link 125. HARQ may include acombination of error detection (e.g., using a cyclic redundancy check(CRC)), forward error correction (FEC), and retransmission (e.g.,automatic repeat request (ARQ)). HARQ may improve throughput at the MAClayer in poor radio conditions (e.g., signal-to-noise conditions). Insome cases, a wireless device may support same-slot HARQ feedback, wherethe device may provide HARQ feedback in a specific slot for datareceived in a previous symbol in the slot. In other cases, the devicemay provide HARQ feedback in a subsequent slot, or according to someother time interval.

Time intervals in LTE or NR may be expressed in multiples of a basictime unit, which may, for example, refer to a sampling period ofT_(s)=1/30,720,000 seconds. Time intervals of a communications resourcemay be organized according to radio frames each having a duration of 10milliseconds (ms), where the frame period may be expressed asT_(f)=307,200 T_(s). The radio frames may be identified by a systemframe number (SFN) ranging from 0 to 1023. Each frame may include 10subframes numbered from 0 to 9, and each subframe may have a duration of1 ms. A subframe may be further divided into 2 slots each having aduration of 0.5 ms, and each slot may contain 6 or 7 modulation symbolperiods (e.g., depending on the length of the cyclic prefix prepended toeach symbol period). Excluding the cyclic prefix, each symbol period maycontain 2048 sampling periods. In some cases, a subframe may be thesmallest scheduling unit of the wireless communications system 100 andmay be referred to as a transmission time interval (TTI). In othercases, a smallest scheduling unit of the wireless communications system100 may be shorter than a subframe or may be dynamically selected (e.g.,in bursts of shortened TTIs (sTTIs) or in selected component carriersusing sTTIs).

In wireless communications system 100, a UE 115 may be connected to abase station 105 over a first communication link, and a wireless device120 may be tethered to the UE 115 over a second communication link. Thefirst communication link may be an example of a link formed uponcompletion of a successful connection procedure (e.g., RRC connectionprocedure) between the UE 115 and the base station 105, and the secondcommunication link may be a universal serial bus (USB) link, Bluetoothlink, Wi-Fi link, Wi-Fi-D link, or 5G sidelink. The wireless device 120may be an example of an XR device, an augmented reality (AR) device, avirtual reality (VR) device, a head mounted device (HMD), a wearabledevice, etc. FIG. 2 illustrates an example of AR and VR devices 200categorized as smartphones or standalone devices in accordance withaspects of the present disclosure. As described above, these AR and VRdevices may be tethered to other smartphones, personal computers (PCs),or consoles (not shown).

In some cases, the form-factor of a wireless device 120 (e.g., an XRHMD) may impose limitations on the number of feasible or accessibleantennas on the wireless device 120 available for uplink transmissions.For example, the wireless device 120 may not have room to support morethan two antennas for uplink transmissions. Similarly, the form-factorof a UE 115 (e.g., a smartphone) may limit the number of antennasavailable for uplink transmissions. For instance, it may be challengingto identify antennas for uplink transmissions in an eight-antenna UE 115design since the antennas at the UE 115 may be used to support a widerange of transmissions, including Wi-Fi, Bluetooth, 5G, 4G, 3G, andother transmissions. As described herein, to improve throughput inwireless communications system 100, the antennas of a wireless device120 may be used by (or shared with) a UE 115 to support transmissionsfrom the UE 115, or the antennas of a UE 115 may be used by (or sharedwith) a wireless device 120 to support transmissions from the wirelessdevice 120.

Using antenna sharing, the antennas at a UE 115 and a wireless device120 may be effectively combined to achieve diversity gain, rank gain, orselection gain. Diversity gain may be achieved since an uplinktransmission may be across multiple antennas (e.g., with open-looplinear delay diversity (LDD) and cyclic delay diversity (CDD)), and theantenna sharing may, in some cases, be transparent to the network. Rankgain may be achieved since a device may have access to more antennas andmay signal a higher capability to the network. For example, four totalantennas may be used for an uplink transmission by a device, where thedevice has access to two local antennas and two auxiliary antennas atanother device. Additionally or alternatively, selection gain may beachieved since a device may be able to select antennas for uplinktransmissions (e.g., two antennas) from the total number of localantennas at the device and auxiliary antennas at another device. Thediversity and rank gain may also result in uplinksignal-to-interference-plus-noise ratio (SINR) gain when the sharedantennas are used for transmissions on the same carrier. Further, SINRgain may also be achieved when the shared antennas are used fortransmissions on different carriers. In some cases, the antennas at theUE 115 and the wireless device 120 may or may not be time or phasesynchronized.

In some aspects, a UE 115 may be configured to generate and transmituplink signals to a base station 105 via local antennas at the UE 115and auxiliary antennas at a wireless device 120. Alternatively, if thewireless device 120 has a modem, the wireless device 120 may beconfigured to generate and transmit uplink signals to the base stationvia local antennas at the wireless device 120 and auxiliary antennas atthe UE 115. Thus, a wireless device 120 may provide additional antennasto a UE 115 for uplink transmissions to a base station 105, or a UE 115may provide additional antennas to a wireless device 120 for uplinktransmission to a base station 105. Local antennas at a first device mayrefer to physical antennas located at the first device, and auxiliaryantennas at a second device may refer to physical antennas located atthe second device and available to be shared with or used by the firstdevice for transmissions to a base station 105.

FIG. 3 illustrates an example of antenna sharing 300 in accordance withaspects of the present disclosure. In the example of FIG. 3, a wirelessdevice 120-a may be tethered to a UE 115-a over a communication link 305(e.g., a USB link). As shown, the UE 115-a (e.g., 5G phone) may beequipped with six antennas to support up to six layers of uplinktransmissions, and an additional two antennas may be provided by thewireless device 120-a. In a first example 300-a, UE 115-a may have a 5Gmodem, and wireless device 120-a may not have a 5G modem. In thisexample, the antennas on the wireless device 120-a may be used by the UE115-a for uplink transmissions to a base station 105 (e.g., the wirelessdevice 120-a may cooperate or share antennas with UE 115-a to improveperformance). In a second example 300-b, wireless device 120-a may havea 5G modem (e.g., where the 5G modem at the UE 115-a may or may not beused to generate signals for transmission on shared antennas between theUE 115-a and wireless device 120-a). In this example, the antennas or asubset of the antennas on UE 115-a may be used by the wireless device120-a for uplink transmissions to a base station 105 (e.g., the UE 115-amay cooperate or share antennas with wireless device 120-a to improveperformance).

A device used to generate uplink signals for transmission on localantennas and auxiliary antennas may be referred to as a first device,and a device used to provide auxiliary antennas to the first device maybe referred to as a second device. The first device or the second devicemay be any of a phone, a head mounted display (HMD), a wearable device,an XR device, an AR device, a VR device, etc. The first device may beconfigured with a modem for generating first uplink signals fortransmission to a base station 105 on local antennas and for generatingsamples of second uplink signals (e.g., in-phase and quadrature (IQ)samples) to send to the second device for transmission to the basestation 105 on auxiliary antennas. The second device may be configuredwith the auxiliary antennas, a power amplifier, a radio frequency (RF)front-end, an analog to digital converter (ADC), a digital to analogconverter (DAC), etc., for upconverting and amplifying the samples ofthe second uplink signals for transmission to a base station 105. Insome cases, the first device may compress the samples of the seconduplink signals before sending the samples to the second device (e.g.,when a high number of antennas is available at the second device, whenthe size of the samples is large, when the data rate approaches orexceeds the throughput of the tethering option used for the connectionbetween the first and second devices, or when compression may reducelatency between the first device and the second device).

In some cases, even though a first device may be capable of transmittinguplink signals using local antennas and auxiliary antennas, the localantennas and the auxiliary antennas may be associated with differentpower classes, and the first device may be limited to a single powerclass for transmissions to a base station 105 using the local antennasand the auxiliary antennas. That is, gains may be limited due to thepower differential between local and auxiliary antennas. As an example,the first device may receive a single configuration for a transmit powerfor transmitting uplink signals to a base station 105 using localantennas and auxiliary antennas. In such cases, if the first device iscapable of transmitting at a higher power than the second device (e.g.,if the total power dissipation of the second device is limited, or ifpower amplifiers of the first device are capable of higher power outputthan power amplifiers of the second device), transmissions from thefirst and second devices according to a single configuration may resultin loss of throughput.

For example, if the single configuration for the transmit power isdetermined based on the capabilities of the first device, the power oftransmissions from the auxiliary antennas may be unexpectedly low,resulting in distorted uplink signals and loss of throughput.Alternatively, if the single configuration for the transmit power isdetermined based on the capabilities of the second device, the power oftransmissions from the local antennas may be lower than a supportedpower, and the first device may not take advantage of the full capacityof the local antennas resulting in loss of throughput. As describedherein, UEs 115 and wireless devices 120 in wireless communicationssystem 100 may support efficient techniques for transmitting uplinksignals to a base station 105 using shared antennas associated withdifferent power classes. In some cases, UE 115-b may receive RRCsignaling indicating a first maximum power reduction and a first maximumallowed power (e.g., P_(EMAX)) associated with a first power class and asecond maximum power reduction and a second maximum allowed powerassociated with a second power class.

FIG. 4 illustrates an example of a wireless communications system 400that supports power control for wireless device cooperative transmissionschemes in accordance with aspects of the present disclosure. Wirelesscommunications system 400 includes base station 105-a, which may be anexample of a base station 105 described with reference to FIGS. 1-3.Wireless communications system also includes UE 115-b and wirelessdevice 120-b, which may be examples of a UE 115 and a wireless device120, respectively, described with reference to FIGS. 1-3. UE 115-b maybe an example of a first device described with reference to FIG. 3, andwireless device 120-b may be an example of a second device describedwith reference to FIG. 3. Base station 105-a may communicate with UE115-b via a communication link 405-a, where communication link 405-a mayinclude one or more configured carriers and a control plane link. Insome cases (e.g., where wireless device 120-b also includes a modemcapable of communications with base station 105-a), base station 105-amay communicate with wireless device 120-b via a communication link405-b.

Wireless communications system 400 may implement aspects of wirelesscommunications system 100. For example, UE 115-b and wireless device120-b in wireless communications system 400 may support efficienttechniques for transmitting uplink signals to base station 105-a usingshared antennas associated with different power classes. In particular,UE 115-b and base station 105-a may support different power classes,maximum power reduction, or maximum allowed power for transmittinguplink signals on local antennas 415 at the UE 115-b and auxiliaryantennas 420 at the wireless device 120-b. That is, a single UE 115-bmay support multiple power classes and may receive multiple transmitpower configurations to use to determine different transmit powers fortransmitting uplink signals to base station 105-a (e.g., on localantennas 415 and auxiliary antennas 420). The different transmit powersmay be based on the different capabilities of the first device and thesecond device. In some cases, UE 115-b may transmit a capabilityindication to base station 105-a indicating that UE 115-b is capable ofusing antennas associated with different power classes for transmittinguplink signals to base station 105-a.

In the example of FIG. 4, UE 115-b may receive a control message (e.g.,downlink control information (DCI) message, MAC control element (CE)message, RRC message) indicating configurations 410 of first and secondtransmit powers for transmitting uplink signals using local antennas 415and auxiliary antennas 420. In some cases, the control message may bereceived in response to transmitting the capability indication to basestation 105-a indicating that UE 115-b is capable of using auxiliaryantennas 420 associated with a second power class, in addition to localantennas 415 associated with a first power class. UE 115-b may thengenerate and transmit first uplink signals via communication link 405-ausing local antennas 415 with the first transmit power, and UE 115-b maygenerate and send a representation (e.g., IQ samples) of second uplinksignals to wireless device 120-b for transmission to base station 105-a(e.g., via one or more carriers of communication link 405-a) usingauxiliary antennas 420 with the second transmit power.

In some cases, each configuration of a transmit power may apply tospecific antenna ports (e.g., across all carriers or across subsets ofcarriers). For example, a first transmit power configuration (e.g.,power class, maximum power reduction, maximum allowed power) may applyto antenna ports associated with local antennas 415 at UE 115-b, and asecond transmit power configuration (e.g., power class, maximum powerreduction, maximum allowed power) may apply to antenna ports associatedwith auxiliary antennas 420 at wireless device 120-b. In such cases, UE115-b may receive configuration information (e.g., in a systeminformation block (SIB), RRC messages, MAC CE messages) indicating thepower configuration parameters (e.g., maximum power reduction, maximumallowed power) per set of antenna ports (e.g., where the sum of thepower across antenna ports in each set of antenna ports for which apower class is applicable may be limited by an indicated power limit).In some examples, uplink transmissions from different sets of antennaports may correspond to multi-panel transmissions (e.g., where differentbeams and polarizations are used for transmitting signals on differentsets of antenna ports) or single-panel transmission (e.g., where thesame beam and polarization is used to transmit signals on different setsof antenna ports).

In some aspects, each transmit power configuration may apply to aspecific set of carriers (e.g., different transmit powers or powerclasses may apply to distinct or non-overlapping sets of carriers). Forexample, the first transmit power configuration may apply to carriersallocated for uplink transmissions associated with local antennas 415 atUE 115-b (e.g., carriers three and four) such that any uplinktransmissions on these carriers may be performed according to the firsttransmit power configuration, and the second transmit powerconfiguration may apply to carriers allocated for uplink transmissionsassociated with auxiliary antennas 420 at wireless device 120-b (e.g.,carriers one and two) such that any uplink transmissions on thesecarriers may be performed according to the second transmit powerconfiguration. In such cases, UE 115-b may receive transmit powerconfiguration information (e.g., via SIB, RRC messages, MAC CE messages)indicating the power configuration parameters (e.g., maximum powerreduction, maximum allowed power) per set of carriers (e.g., where thesum of the power across carriers in each set of carriers for which apower class is applicable may be limited by the indicated power limit).

In some aspects, transmit power may be controlled separately fortransmissions from the UE 115-b and the wireless device 120-b. Forinstance, the transmit power may be controlled separately for each setof antennas or each set of carriers (e.g., separate transmit powercontrol loops may be configured, with separate transmit power controlcommands issued by the base station 105-a). In such aspects, basestation 105-a may transmit a first transmit power control (TPC) commandfor transmissions from the UE 115-b based on a first power control loopconfigured for transmissions from the UE 115-b, and the base station105-a may transmit a second TPC command for transmissions from thewireless device 120-b based on a second power control loop configuredfor transmissions from the wireless device 120-b. The first TPC commandmay be a delta (or offset) of a first, current transmit power being usedby UE 115-b for transmissions to base station 105-a, and the second TPCcommand may be a delta (or offset) of a second, current transmit powerbeing used by wireless device 120-b for transmissions to base station105-a. That is, since the UE 115-b and the wireless device 120-b mayhave separate power control loops, the base station 105-a may issueseparate power control commands (e.g., one for transmissions fromantennas of the UE 115-b and one for transmissions from antennas of thewireless device 120-b).

FIG. 5 illustrates an example of a process flow 500 that supports powercontrol for wireless device cooperative transmission schemes inaccordance with aspects of the present disclosure. Process flow 500illustrates aspects of techniques performed by a UE 115-c, which may bean example of a UE 115 described with reference to FIGS. 1-4. Processflow 500 also illustrates aspects of techniques performed by wirelessdevice 120-c, which may be an example of a wireless device 120 describedwith reference to FIGS. 1-4. Process flow 500 also illustrates aspectsof techniques performed by a base station 105-b, which may be an exampleof a base station 105 described with reference to FIGS. 1-4. Asdescribed herein, UE 115-c may be referred to as a first device, andwireless device 120-c may be referred to as a second device.

At 505, UE 115-c may communicate (e.g., exchange data) with base station105-b over a first communication link using a set of local antennasassociated with a first power class. In some examples, the communicationat 505 may be an example of a connection procedure (e.g., RRC connectionprocedure) between UE 115-c and base station 105-b. In some examples,the operations of communication at 505 may occur at a communicationsmanager. At 510, UE 115-c may identify a set of auxiliary antennas ofwireless device 120-c associated with a second power class fortransmitting uplink signals to base station 105-b. UE 115-c may receiveconfiguration information from wireless device 120-c via a modem of thewireless device (not shown), and UE 115-c may determine from theconfiguration information that wireless device 120-c may provideadditional antennas to UE 115-c for uplink transmissions to base station105-b. In some examples, identification of a set of auxiliary antennasof wireless device 120-c may be performed by an auxiliary antennamanager. UE 115-c may be in communication with wireless device 120-cover a second communication link. The second communication link may be aUSB link, a Bluetooth link, a Wi-Fi link, or a 5G sidelink. At 515, UE115-c may transmit a capability indication to base station 105-bindicating the second power class for the set of auxiliary antennas. Insome cases, the UE 115-c may indicate power classes associated with theset of local antennas and the set of auxiliary antennas. For example,the UE 115-c may indicate a first power class for the set of localantennas and a second power class for and the set of auxiliary antennas.In some examples, transmitting the capability indication may beperformed by a power class manager.

At 520, UE 115-c may receive a control message (e.g., DCI message, RRCmessage, MAC CE message) from base station 105-b indicating a firsttransmit power configuration (e.g., maximum power reduction indicator,maximum allowed power) for transmitting uplink signals via the set oflocal antennas and a second transmit power configuration fortransmitting uplink signals via the set of auxiliary antennas. In somecases, the control message may be received in response to transmittingthe capability indication to base station 105-b indicating that UE 115-cis capable of using auxiliary antennas associated with a second powerclass, in addition to local antennas associated with a first powerclass. In some examples, base station 105-b may transmit the controlmessage with a transmit power manager.

The first and second transmit power configurations may apply the perdevice power classes across all carriers, or across subsets (e.g.,non-intersecting subsets) of subcarriers. For example, a first powerclass limit (e.g., XR power-class limit) may apply to a first subset ofcarriers and a second power class limit (e.g., UE power-class limit) mayapply to a second subset of carriers. Additionally, or alternatively,the control message may associate the set of local antennas and the setof auxiliary antennas to different sets of antenna ports. For example,the set of local antennas may be associated with a first set of antennaports and the set of auxiliary antennas may be associated with a secondset of antenna ports. Additionally, or alternatively, different maximumpower reduction may be applied for the different sets of antennas. Forexample, a first maximum power reduction (or table of maximum powerreduction values according to transmission bandwidth) may be applied fortransmissions via the set of local antennas and a second maximum powerreduction (or table of maximum power reduction values according totransmission bandwidth) may be applied for transmissions via the set ofauxiliary antennas. Additionally or alternatively, different maximumallowed power values may be provided per set of antennas (e.g., percell). For example, for a given serving cell, a first maximum allowedpower value may be configured for the set of local antennas and asecond, different maximum allowed power value may be configured for theset of auxiliary antennas. The control message may also include transmitpower control commands associated with the different transmit powerconfigurations. For example, the control message may include a firsttransmit power control command that applies to the first subset ofcarriers or first set of antenna ports and a second transmit powercontrol command that applies to the second subset of carriers or secondset of antenna ports.

At 525, UE 115-c may generate first uplink signals for transmission tobase station 105-b on local antennas at UE 115-c, and/or UE 115-c maygenerate a representation (e.g., IQ samples) of second uplink signalsfor transmission to base station 105-b via auxiliary antennas atwireless device 120-c. In some examples, UE 115-c may generate theuplink signals with an uplink signal manager. At 530, UE 115-c maytransmit the first uplink signals using at least one antenna from theset of local antennas according to the first power configurationreceived from base station 105-b at 520. For example, the UE 115-c maytransmit the first uplink signals using at least one antenna from theset of local antennas at a first transmit power determined in accordancewith a first maximum power reduction, a first maximum allowed power, afirst transmit power control command, or combinations thereof. In someexamples, UE 115-c may transmit the first uplink signals with an uplinksignal manager. Additionally, or alternatively, at 535, UE 115-c maysend the representation (e.g., IQ samples) of the second uplink signalsto the second device 120-c for transmission via at least one antennafrom the set of auxiliary antennas according to the second transmitpower configuration received from base station 105-b at 520. Forexample, the second device 120-c may transmit the second uplink signalsusing at least one antenna from the set of auxiliary antennas at asecond transmit power determined in accordance with a second maximumpower reduction, a second maximum allowed power, a second transmit powercontrol command, or combinations thereof. UE 115-c may also transmit acontrol message to wireless device 120-c indicating the second power fortransmitting the second uplink signals via the set of auxiliaryantennas. Wireless device 120-c may receive the samples of the seconduplink signals and the indication of the second power, and wirelessdevice 120-c may upconvert, amplify, and transmit the second uplinksignals with the second power to base station 105-b using the auxiliaryantennas. In some examples, wireless device 120-c may transmit thesecond uplink signals with an uplink signal manager.

FIG. 6 shows a block diagram 600 of a device 605 that supports powercontrol for wireless device cooperative transmission schemes inaccordance with aspects of the present disclosure. The device 605 may bean example of aspects of a UE 115 as described herein. The device 605may include a receiver 610, a communications manager 615, and atransmitter 620. The device 605 may also include a processor. Each ofthese components may be in communication with one another (e.g., via oneor more buses).

The receiver 610 may receive information such as packets, user data, orcontrol information associated with various information channels (e.g.,control channels, data channels, and information related to powercontrol for wireless device cooperative transmission schemes, etc.).Information may be passed on to other components of the device 605. Thereceiver 610 may be an example of aspects of the transceiver 920described with reference to FIG. 9. The receiver 610 may utilize asingle antenna or a set of antennas.

The communications manager 615 may communicate with a base station overa first communication link using a set of local antennas associated witha first power class, identify a set of auxiliary antennas of a seconddevice associated with a second power class for transmitting uplinksignals to the base station, where the first device is in communicationwith the second device over a second communication link, transmit, basedon identifying the set of auxiliary antennas of the second device, anindication of the second power class for the set of auxiliary antennasto the base station, identify uplink signals to transmit to the basestation using at least one antenna of the set of local antennas of thefirst device associated with the first power class or of the set ofauxiliary antennas of the second device associated with the second powerclass, and transmit the uplink signals to the base station via the atleast one antenna. The communications manager 615 may be an example ofaspects of the communications manager 910 described herein. Thecommunications manager 615 may exchange information 625 with receiver610. For example, the communications manager 615 may receive a controlmessage (e.g., DCI message, RRC message, MAC CE message) from receiver610 indicating a first transmit power configuration (e.g., maximum powerreduction indicator, maximum allowed power) for transmitting uplinksignals via a set of local antennas and a second transmit powerconfiguration for transmitting uplink signals via a set of auxiliaryantennas. The communications manager 615 may exchange information 630with transmitter 620. For example, the communications manager 615 maycommunicate first uplink signals according to the first powerconfiguration and/or second uplink signals according to the secondtransmit power configuration for transmission by transmitter 620.

The communications manager 615, or its sub-components, may beimplemented in hardware, code (e.g., software or firmware) executed by aprocessor, or any combination thereof. If implemented in code executedby a processor, the functions of the communications manager 615, or itssub-components may be executed by a general-purpose processor, a DSP, anapplication-specific integrated circuit (ASIC), a FPGA or otherprogrammable logic device, discrete gate or transistor logic, discretehardware components, or any combination thereof designed to perform thefunctions described in the present disclosure.

The actions performed by the communications manager 615 as describedherein may be implemented to realize one or more potential advantages.One implementation may allow a UE 115 to provide improved quality andreliability of service, as throughput is increased and distorted uplinksignals are mitigated.

The communications manager 615, or its sub-components, may be physicallylocated at various positions, including being distributed such thatportions of functions are implemented at different physical locations byone or more physical components. In some examples, the communicationsmanager 615, or its sub-components, may be a separate and distinctcomponent in accordance with various aspects of the present disclosure.In some examples, the communications manager 615, or its sub-components,may be combined with one or more other hardware components, includingbut not limited to an input/output (I/O) component, a transceiver, anetwork server, another computing device, one or more other componentsdescribed in the present disclosure, or a combination thereof inaccordance with various aspects of the present disclosure.

The transmitter 620 may transmit signals generated by other componentsof the device 605. In some examples, the transmitter 620 may becollocated with a receiver 610 in a transceiver module. For example, thetransmitter 620 may be an example of aspects of the transceiver 920described with reference to FIG. 9. The transmitter 620 may utilize asingle antenna or a set of antennas.

FIG. 7 shows a block diagram 700 of a device 705 that supports powercontrol for wireless device cooperative transmission schemes inaccordance with aspects of the present disclosure. The device 705 may bean example of aspects of a device 605, or a UE 115 as described herein.The device 705 may include a receiver 710, a communications manager 715,and a transmitter 740. The device 705 may also include a processor. Eachof these components may be in communication with one another (e.g., viaone or more buses).

The receiver 710 may receive information such as packets, user data, orcontrol information associated with various information channels (e.g.,control channels, data channels, and information related to powercontrol for wireless device cooperative transmission schemes, etc.).Information may be passed on to other components of the device 705. Thereceiver 710 may be an example of aspects of the transceiver 920described with reference to FIG. 9. The receiver 710 may utilize asingle antenna or a set of antennas.

The communications manager 715 may be an example of aspects of thecommunications manager 615 as described herein. The communicationsmanager 715 may include a local antenna manager 720, an auxiliaryantenna manager 725, a power class manager 730, and an uplink signalmanager 735. The communications manager 715 may be an example of aspectsof the communications manager 910 described herein. The communicationsmanager 715 may exchange information 745 with receiver 710. For example,the communications manager 715 may receive a control message (e.g., DCImessage, RRC message, MAC CE message) from receiver 710 indicating afirst transmit power configuration (e.g., maximum power reductionindicator, maximum allowed power) for transmitting uplink signals via aset of local antennas and a second transmit power configuration fortransmitting uplink signals via a set of auxiliary antennas. Thecommunications manager 715 may exchange information 750 with transmitter740. For example, the communications manager 715 may communicate firstuplink signals according to the first power configuration and/or seconduplink signals according to the second transmit power configuration fortransmission by transmitter 740.

The local antenna manager 720 may communicate with a base station over afirst communication link using a set of local antennas associated with afirst power class. The auxiliary antenna manager 725 may identify a setof auxiliary antennas of a second device associated with a second powerclass for transmitting uplink signals to the base station, where thefirst device is in communication with the second device over a secondcommunication link. The power class manager 730 may transmit, based onidentifying the set of auxiliary antennas of the second device, anindication of the second power class for the set of auxiliary antennasto the base station. The uplink signal manager 735 may identify uplinksignals to transmit to the base station using at least one antenna ofthe set of local antennas of the first device associated with the firstpower class or of the set of auxiliary antennas of the second deviceassociated with the second power class and transmit the uplink signalsto the base station via the at least one antenna.

The transmitter 740 may transmit signals generated by other componentsof the device 705. In some examples, the transmitter 740 may becollocated with a receiver 710 in a transceiver module. For example, thetransmitter 740 may be an example of aspects of the transceiver 920described with reference to FIG. 9. The transmitter 740 may utilize asingle antenna or a set of antennas.

FIG. 8 shows a block diagram 800 of a communications manager 805 thatsupports power control for wireless device cooperative transmissionschemes in accordance with aspects of the present disclosure. Thecommunications manager 805 may be an example of aspects of acommunications manager 615, a communications manager 715, or acommunications manager 910 described herein. The communications manager805 may include a local antenna manager 810, an auxiliary antennamanager 815, a power class manager 820, an uplink signal manager 825, atransmit power manager 830, and a RRC signaling manager 835. Each ofthese modules may communicate, directly or indirectly, with one another(e.g., via one or more buses).

The local antenna manager 810 may communicate with a base station over afirst communication link using a set of local antennas associated with afirst power class. In some examples, the local antenna manager 810 maycommunicate information 840 to the uplink signal manager 825 which mayinclude first uplink signals using at least one antenna from the set oflocal antennas at a first transmit power determined in accordance with afirst maximum power reduction, a first maximum allowed power, a firsttransmit power control command, or combinations thereof. The auxiliaryantenna manager 815 may identify a set of auxiliary antennas of a seconddevice associated with a second power class for transmitting uplinksignals to the base station, where the first device is in communicationwith the second device over a second communication link. In someexamples, the auxiliary antenna manager 815 may communicate information845 to the uplink signal manager 825 which may include second uplinksignals using at least one antenna from the set of auxiliary antennas ata second transmit power determined in accordance with a second maximumpower reduction, a second maximum allowed power, a second transmit powercontrol command, or combinations thereof.

The power class manager 820 may transmit, based on identifying the setof auxiliary antennas of the second device, an indication of the secondpower class for the set of auxiliary antennas to the base station. Insome examples, the power class manager 820 may communicate information850 to the uplink signal manager 825 which may include an indication ofthe second power class for the set of auxiliary antennas. The uplinksignal manager 825 may identify uplink signals to transmit to the basestation using at least one antenna of the set of local antennas of thefirst device associated with the first power class or of the set ofauxiliary antennas of the second device associated with the second powerclass. In some examples, the uplink signal manager 825 may transmit theuplink signals to the base station via the at least one antenna. In someexamples, the uplink signal manager 825 may communicate informationwhich may include uplink signals associated with the first power classor the second power class.

The transmit power manager 830 may receive, from the base station, afirst power control command associated with transmitting the uplinksignals via the set of local antennas of the first device and a secondpower control command associated with transmitting the uplink signalsvia the set of auxiliary antennas of the second device. In someexamples, the transmit power manager 830 may communicate information 860to the uplink signal manager 825 which may include a first power controlcommand or a second power control command. In some examples, the uplinksignal manager 825 may transmit a first component signal of the uplinksignals to the base station via the at least one antenna of the set oflocal antennas of the first device based on a first power control loopassociated with the set of local antennas of the first device and thefirst power control command. In some examples, the uplink signal manager825 may transmit a second component signal of the uplink signals to thebase station via the at least one antenna of the set of auxiliaryantennas of the second device based on a second power control loopassociated with the set of auxiliary antennas of the second device andthe second power control command. In some examples, the transmit powermanager 830 may transmit, to the second device over the secondcommunication link, a control message indicating a transmit power fortransmitting the uplink signals via the set of auxiliary antennas of thesecond device.

In some examples, the uplink signal manager 825 may send in-phase andquadrature samples of the uplink signals to the second device fortransmission to the base station via the at least one antenna of the setof auxiliary antennas of the second device. In some cases, the in-phaseand quadrature samples are compressed. In some cases, the first powerclass is applied to antenna ports of the first device associated withthe set of local antennas. In some cases, the second power class isapplied to antenna ports of the second device associated with the set ofauxiliary antennas. In some cases, the first power class is applied to afirst set of carriers allocated for uplink transmissions from the firstdevice using the set of local antennas. In some cases, the second powerclass is applied to a second set of carriers allocated for uplinktransmissions from the second device using the set of auxiliaryantennas.

The RRC signaling manager 835 may receive RRC signaling indicating afirst maximum power reduction and a first maximum allowed power(P_(EMAX)) associated with the first power class and a second maximumpower reduction and a second maximum allowed power (P_(EMAX)) associatedwith the second power class. In some examples, the RRC signaling manager835 may communicate information 865 to the uplink signal manager 825which may include a first maximum power reduction and a first maximumallowed power and a second maximum power reduction and a second maximumallowed power. In some cases, the first device is capable of supportinga set of power classes including the first power class and the secondpower class. In some cases, the second communication link includes a USBlink, a Bluetooth link, a Wi-Fi link, or a sidelink. In some cases, thefirst device is a UE, a head mounted display, or a wearable device, andthe second device is a UE, a head mounted display, or a wearable device,where the head mounted display includes an extended reality head mounteddisplay, an augmented reality head mounted display, or a virtual realityhead mounted display.

FIG. 9 shows a diagram of a system 900 including a device 905 thatsupports power control for wireless device cooperative transmissionschemes in accordance with aspects of the present disclosure. The device905 may be an example of or include the components of device 605, device705, or a UE 115 as described herein. The device 905 may includecomponents for bi-directional voice and data communications includingcomponents for transmitting and receiving communications, including acommunications manager 910, an I/O controller 915, a transceiver 920, anantenna 925, memory 930, and a processor 940. These components may be inelectronic communication via one or more buses (e.g., bus 945).

The communications manager 910 may communicate with a base station overa first communication link using a set of local antennas associated witha first power class, identify a set of auxiliary antennas of a seconddevice associated with a second power class for transmitting uplinksignals to the base station, where the first device is in communicationwith the second device over a second communication link, transmit, basedon identifying the set of auxiliary antennas of the second device, anindication of the second power class for the set of auxiliary antennasto the base station, identify uplink signals to transmit to the basestation using at least one antenna of the set of local antennas of thefirst device associated with the first power class or of the set ofauxiliary antennas of the second device associated with the second powerclass, and transmit the uplink signals to the base station via the atleast one antenna.

The I/O controller 915 may manage input and output signals for thedevice 905. The I/O controller 915 may also manage peripherals notintegrated into the device 905. In some cases, the I/O controller 915may represent a physical connection or port to an external peripheral.In some cases, the I/O controller 915 may utilize an operating systemsuch as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS/2®, UNIX®, LINUX®, oranother known operating system. In other cases, the I/O controller 915may represent or interact with a modem, a keyboard, a mouse, atouchscreen, or a similar device. In some cases, the I/O controller 915may be implemented as part of a processor. In some cases, a user mayinteract with the device 905 via the I/O controller 915 or via hardwarecomponents controlled by the I/O controller 915.

The transceiver 920 may communicate bi-directionally, via one or moreantennas, wired, or wireless links as described above. For example, thetransceiver 920 may represent a wireless transceiver and may communicatebi-directionally with another wireless transceiver. The transceiver 920may also include a modem to modulate the packets and provide themodulated packets to the antennas for transmission, and to demodulatepackets received from the antennas.

In some cases, the wireless device may include a single antenna 925.However, in some cases the device may have more than one antenna 925,which may be capable of concurrently transmitting or receiving multiplewireless transmissions.

The memory 930 may include RAM and ROM. The memory 930 may storecomputer-readable, computer-executable code 935 including instructionsthat, when executed, cause the processor to perform various functionsdescribed herein. In some cases, the memory 930 may contain, among otherthings, a BIOS which may control basic hardware or software operationsuch as the interaction with peripheral components or devices.

The processor 940 may include an intelligent hardware device, (e.g., ageneral-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, anFPGA, a programmable logic device, a discrete gate or transistor logiccomponent, a discrete hardware component, or any combination thereof).In some cases, the processor 940 may be configured to operate a memoryarray using a memory controller. In other cases, a memory controller maybe integrated into the processor 940. The processor 940 may beconfigured to execute computer-readable instructions stored in a memory(e.g., the memory 930) to cause the device 905 to perform variousfunctions (e.g., functions or tasks supporting power control forwireless device cooperative transmission schemes).

Based on transmitting uplink signals to a base station using sharedantennas associated with different power classes, a processor 940 mayefficiently determine a configuration resulting in increased throughputand undistorted uplink signals. As such, the processor may be ready torespond more efficiently through the reduction of a ramp up inprocessing power due to distorted signals.

The code 935 may include instructions to implement aspects of thepresent disclosure, including instructions to support wirelesscommunications. The code 935 may be stored in a non-transitorycomputer-readable medium such as system memory or other type of memory.In some cases, the code 935 may not be directly executable by theprocessor 940 but may cause a computer (e.g., when compiled andexecuted) to perform functions described herein.

FIG. 10 shows a block diagram 1000 of a device 1005 that supports powercontrol for wireless device cooperative transmission schemes inaccordance with aspects of the present disclosure. The device 1005 maybe an example of aspects of a base station 105 as described herein. Thedevice 1005 may include a receiver 1010, a communications manager 1015,and a transmitter 1020. The device 1005 may also include a processor.Each of these components may be in communication with one another (e.g.,via one or more buses).

The receiver 1010 may receive information such as packets, user data, orcontrol information associated with various information channels (e.g.,control channels, data channels, and information related to powercontrol for wireless device cooperative transmission schemes, etc.).Information may be passed on to other components of the device 1005. Thereceiver 1010 may be an example of aspects of the transceiver 1320described with reference to FIG. 13. The receiver 1010 may utilize asingle antenna or a set of antennas.

The communications manager 1015 may communicate with a first device overa first communication link, the first device using a set of localantennas associated with a first power class, receive, from the firstdevice, an indication of a second power class associated with a set ofauxiliary antennas of a second device, where the first device is incommunication with the second device over a second communication link,transmit, to the first device, a control message indicating a firstpower for uplink transmissions via the set of local antennas of thefirst device and a second power for uplink transmissions via the set ofauxiliary antennas of the second device, and receive first uplinksignals from the first device transmitted with the first power andsecond uplink signals from the second device transmitted with the secondpower based on the transmitting. The communications manager 1015 may bean example of aspects of the communications manager 1310 describedherein. The communications manager 1015 may exchange information 1025with receiver 1010. For example, the communications manager 1015 mayreceive from receiver 1010 first uplink signals according to the firstpower configuration and/or second uplink signals according to the secondtransmit power configuration. The communications manager 1015 mayexchange information 1030 with transmitter 1020. For example, thecommunications manager 1015 may communicate a control message (e.g., DCImessage, RRC message, MAC CE message) to transmitter 1020 indicating afirst transmit power configuration (e.g., maximum power reductionindicator, maximum allowed power) for transmitting uplink signals via aset of local antennas and a second transmit power configuration fortransmitting uplink signals via a set of auxiliary antennas.

The communications manager 1015, or its sub-components, may beimplemented in hardware, code (e.g., software or firmware) executed by aprocessor, or any combination thereof. If implemented in code executedby a processor, the functions of the communications manager 1015, or itssub-components may be executed by a general-purpose processor, a DSP, anapplication-specific integrated circuit (ASIC), a FPGA or otherprogrammable logic device, discrete gate or transistor logic, discretehardware components, or any combination thereof designed to perform thefunctions described in the present disclosure.

The actions performed by the communications manager 1015 as describedherein may be implemented to realize one or more potential advantages.One implementation may allow a base station 105 to provide improvedquality and reliability of service, as throughput is increased anddistorted uplink signals are mitigated.

The communications manager 1015, or its sub-components, may bephysically located at various positions, including being distributedsuch that portions of functions are implemented at different physicallocations by one or more physical components. In some examples, thecommunications manager 1015, or its sub-components, may be a separateand distinct component in accordance with various aspects of the presentdisclosure. In some examples, the communications manager 1015, or itssub-components, may be combined with one or more other hardwarecomponents, including but not limited to an input/output (I/O)component, a transceiver, a network server, another computing device,one or more other components described in the present disclosure, or acombination thereof in accordance with various aspects of the presentdisclosure.

The transmitter 1020 may transmit signals generated by other componentsof the device 1005. In some examples, the transmitter 1020 may becollocated with a receiver 1010 in a transceiver module. For example,the transmitter 1020 may be an example of aspects of the transceiver1320 described with reference to FIG. 13. The transmitter 1020 mayutilize a single antenna or a set of antennas.

FIG. 11 shows a block diagram 1100 of a device 1105 that supports powercontrol for wireless device cooperative transmission schemes inaccordance with aspects of the present disclosure. The device 1105 maybe an example of aspects of a device 1005, or a base station 105 asdescribed herein. The device 1105 may include a receiver 1110, acommunications manager 1115, and a transmitter 1135. The device 1105 mayalso include a processor. Each of these components may be incommunication with one another (e.g., via one or more buses).

The receiver 1110 may receive information such as packets, user data, orcontrol information associated with various information channels (e.g.,control channels, data channels, and information related to powercontrol for wireless device cooperative transmission schemes, etc.).Information may be passed on to other components of the device 1105. Thereceiver 1110 may be an example of aspects of the transceiver 1320described with reference to FIG. 13. The receiver 1110 may utilize asingle antenna or a set of antennas.

The communications manager 1115 may be an example of aspects of thecommunications manager 1015 as described herein. The communicationsmanager 1115 may include a power class manager 1120, a transmit powermanager 1125, and an uplink signal manager 1130. The communicationsmanager 1115 may be an example of aspects of the communications manager1310 described herein. The communications manager 1115 may exchangeinformation 1140 with receiver 1110. For example, the communicationsmanager 1115 may receive from receiver 1110 first uplink signalsaccording to the first power configuration and/or second uplink signalsaccording to the second transmit power configuration. The communicationsmanager 1115 may exchange information 1145 with transmitter 1135. Forexample, the communications manager 1115 may communicate a controlmessage (e.g., DCI message, RRC message, MAC CE message) to transmitter1135 indicating a first transmit power configuration (e.g., maximumpower reduction indicator, maximum allowed power) for transmittinguplink signals via a set of local antennas and a second transmit powerconfiguration for transmitting uplink signals via a set of auxiliaryantennas.

The power class manager 1120 may communicate with a first device over afirst communication link, the first device using a set of local antennasassociated with a first power class and receive, from the first device,an indication of a second power class associated with a set of auxiliaryantennas of a second device, where the first device is in communicationwith the second device over a second communication link. The transmitpower manager 1125 may transmit, to the first device, a control messageindicating a first power for uplink transmissions via the set of localantennas of the first device and a second power for uplink transmissionsvia the set of auxiliary antennas of the second device. The uplinksignal manager 1130 may receive first uplink signals from the firstdevice transmitted with the first power and second uplink signals fromthe second device transmitted with the second power based on thetransmitting.

The transmitter 1135 may transmit signals generated by other componentsof the device 1105. In some examples, the transmitter 1135 may becollocated with a receiver 1110 in a transceiver module. For example,the transmitter 1135 may be an example of aspects of the transceiver1320 described with reference to FIG. 13. The transmitter 1135 mayutilize a single antenna or a set of antennas.

FIG. 12 shows a block diagram 1200 of a communications manager 1205 thatsupports power control for wireless device cooperative transmissionschemes in accordance with aspects of the present disclosure. Thecommunications manager 1205 may be an example of aspects of acommunications manager 1015, a communications manager 1115, or acommunications manager 1310 described herein. The communications manager1205 may include a power class manager 1210, a transmit power manager1215, an uplink signal manager 1220, an antenna port manager 1225, acarrier manager 1230, and a RRC signaling manager 1235. Each of thesemodules may communicate, directly or indirectly, with one another (e.g.,via one or more buses).

The power class manager 1210 may communicate with a first device over afirst communication link, the first device using a set of local antennasassociated with a first power class. In some examples, the power classmanager 1210 may receive, from the first device, an indication of asecond power class associated with a set of auxiliary antennas of asecond device, where the first device is in communication with thesecond device over a second communication link. In some examples, thepower class manager 1210 may communicate information 1240 from theuplink signal manager 1240 which may include an indication of a secondpower class associated with a set of auxiliary antennas. The transmitpower manager 1215 may transmit, to the first device, a control messageindicating a first power for uplink transmissions via the set of localantennas of the first device and a second power for uplink transmissionsvia the set of auxiliary antennas of the second device. In someexamples, the transmit power manager 1215 may communicate information1245 which may include a control message indicating a first power foruplink transmissions via a set of local antennas and a second power foruplink transmissions via a set of auxiliary antennas. The uplink signalmanager 1220 may receive first uplink signals from the first devicetransmitted with the first power and second uplink signals from thesecond device transmitted with the second power based on thetransmitting. In some examples, the uplink signal manager 1220 maycommunicate information which may include receiving first uplink signalstransmitted with a first power and second uplink signals transmittedwith a second power.

In some cases, the first power class is applied to antenna ports of thefirst device associated with the set of local antennas. In some cases,the second power class is applied to antenna ports of the second deviceassociated with the set of auxiliary antennas. The antenna port manager1225 may identify a first antenna port index associated with the firstuplink signals and a second antenna port index associated with thesecond uplink signals. In some examples, the antenna port manager 1225may communicate information 1255 from the uplink signal manager 1240which may include a first antenna port index associated with firstuplink signals and a second antenna port index associated with seconduplink signals. In some examples, the uplink signal manager 1220 maydetermine that the first uplink signals are from the first device basedon the first antenna port index and the second uplink signals are fromthe second device based on the second antenna port index.

In some cases, the first power class is applied to a first set ofcarriers allocated for uplink transmissions from the first device usingthe set of local antennas. In some cases, the second power class isapplied to a second set of carriers allocated for uplink transmissionsfrom the second device using the set of auxiliary antennas. The carriermanager 1230 may identify that the first uplink signals are received onthe first set of carriers and the second uplink signals are received onthe second set of carriers. In some examples, the carrier manager 1230may communicate information 1260 from the uplink signal manager 1240which may include first uplink signals received on a first set ofcarriers and second uplink signals received on a second set of carriers.In some examples, the uplink signal manager 1220 may determine that thefirst uplink signals are from the first device based on the first uplinksignals being received on the first set of carriers and the seconduplink signals are from the second device based on the second uplinksignals being received on the second set of carriers.

The RRC signaling manager 1235 may transmit RRC signaling indicating afirst maximum power reduction and a first maximum allowed power(P_(EMAX)) associated with the first power class and a second maximumpower reduction and a second maximum allowed power (P_(EMAX)) associatedwith the second power class. In some examples, the RRC signaling manager1235 may communicate information 1265 which may include RRC signalingindicating a first maximum power reduction and a first maximum allowedpower, and a second maximum power reduction and a second maximum allowedpower. In some cases, the first device is capable of supporting a set ofpower classes including the first power class and the second powerclass. In some cases, the second communication link includes a USB link,a Bluetooth link, a Wi-Fi link, or a sidelink. In some cases, the firstdevice is a UE, a head mounted display, or a wearable device, and thesecond device is a UE, a head mounted display, or a wearable device,where the head mounted display includes an extended reality head mounteddisplay, an augmented reality head mounted display, or a virtual realityhead mounted display.

FIG. 13 shows a diagram of a system 1300 including a device 1305 thatsupports power control for wireless device cooperative transmissionschemes in accordance with aspects of the present disclosure. The device1305 may be an example of or include the components of device 1005,device 1105, or a base station 105 as described herein. The device 1305may include components for bi-directional voice and data communicationsincluding components for transmitting and receiving communications,including a communications manager 1310, a network communicationsmanager 1315, a transceiver 1320, an antenna 1325, memory 1330, aprocessor 1340, and an inter-station communications manager 1345. Thesecomponents may be in electronic communication via one or more buses(e.g., bus 1350).

The communications manager 1310 may communicate with a first device overa first communication link, the first device using a set of localantennas associated with a first power class, receive, from the firstdevice, an indication of a second power class associated with a set ofauxiliary antennas of a second device, where the first device is incommunication with the second device over a second communication link,transmit, to the first device, a control message indicating a firstpower for uplink transmissions via the set of local antennas of thefirst device and a second power for uplink transmissions via the set ofauxiliary antennas of the second device, and receive first uplinksignals from the first device transmitted with the first power andsecond uplink signals from the second device transmitted with the secondpower based on the transmitting.

The network communications manager 1315 may manage communications withthe core network (e.g., via one or more wired backhaul links). Forexample, the network communications manager 1315 may manage the transferof data communications for client devices, such as one or more UEs 115.

The transceiver 1320 may communicate bi-directionally, via one or moreantennas, wired, or wireless links as described above. For example, thetransceiver 1320 may represent a wireless transceiver and maycommunicate bi-directionally with another wireless transceiver. Thetransceiver 1320 may also include a modem to modulate the packets andprovide the modulated packets to the antennas for transmission, and todemodulate packets received from the antennas.

In some cases, the wireless device may include a single antenna 1325.However, in some cases the device may have more than one antenna 1325,which may be capable of concurrently transmitting or receiving multiplewireless transmissions.

The memory 1330 may include RAM, ROM, or a combination thereof. Thememory 1330 may store computer-readable code 1335 including instructionsthat, when executed by a processor (e.g., the processor 1340) cause thedevice to perform various functions described herein. In some cases, thememory 1330 may contain, among other things, a BIOS which may controlbasic hardware or software operation such as the interaction withperipheral components or devices.

The processor 1340 may include an intelligent hardware device, (e.g., ageneral-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, anFPGA, a programmable logic device, a discrete gate or transistor logiccomponent, a discrete hardware component, or any combination thereof).In some cases, the processor 1340 may be configured to operate a memoryarray using a memory controller. In some cases, a memory controller maybe integrated into processor 1340. The processor 1340 may be configuredto execute computer-readable instructions stored in a memory (e.g., thememory 1330) to cause the device 1305 to perform various functions(e.g., functions or tasks supporting power control for wireless devicecooperative transmission schemes).

Based on transmitting uplink signals using shared antennas associatedwith different power classes, a processor 1340 may efficiently determinea configuration resulting in increased throughput and undistorted uplinksignals. As such, the processor may be ready to respond more efficientlythrough the reduction of a ramp up in processing power due to distortedsignals.

The inter-station communications manager 1345 may manage communicationswith other base station 105 and may include a controller or schedulerfor controlling communications with UEs 115 in cooperation with otherbase stations 105. For example, the inter-station communications manager1345 may coordinate scheduling for transmissions to UEs 115 for variousinterference mitigation techniques such as beamforming or jointtransmission. In some examples, the inter-station communications manager1345 may provide an X2 interface within an LTE/LTE-A wirelesscommunication network technology to provide communication between basestations 105.

The code 1335 may include instructions to implement aspects of thepresent disclosure, including instructions to support wirelesscommunications. The code 1335 may be stored in a non-transitorycomputer-readable medium such as system memory or other type of memory.In some cases, the code 1335 may not be directly executable by theprocessor 1340 but may cause a computer (e.g., when compiled andexecuted) to perform functions described herein.

FIG. 14 shows a flowchart illustrating a method 1400 that supports powercontrol for wireless device cooperative transmission schemes inaccordance with aspects of the present disclosure. The operations ofmethod 1400 may be implemented by a UE 115 or its components asdescribed herein. For example, the operations of method 1400 may beperformed by a communications manager as described with reference toFIGS. 6 through 9. In some examples, a UE may execute a set ofinstructions to control the functional elements of the UE to perform thefunctions described below. Additionally, or alternatively, a UE mayperform aspects of the functions described below using special-purposehardware.

At 1405, the UE may communicate with a base station over a firstcommunication link using a set of local antennas associated with a firstpower class. The communication may involve an exchange of data betweenthe UE and the base station. The operations of 1405 may be performedaccording to the methods described herein. In some examples, aspects ofthe operations of 1405 may be performed by a local antenna manager asdescribed with reference to FIGS. 6 through 9.

At 1410, the UE may identify a set of auxiliary antennas of a seconddevice associated with a second power class for transmitting uplinksignals to the base station, where the first device is in communicationwith the second device over a second communication link. The UE mayreceive configuration information from a wireless device via a modem ofthe wireless device, and the UE may determine from the configurationinformation that the wireless device may provide additional antennas tothe UE for uplink transmissions to a base station. The operations of1410 may be performed according to the methods described herein. In someexamples, aspects of the operations of 1410 may be performed by anauxiliary antenna manager as described with reference to FIGS. 6 through9.

At 1415, the UE may transmit, based on identifying the set of auxiliaryantennas of the second device, an indication of the second power classfor the set of auxiliary antennas to the base station. After determiningauxiliary antennas of a wireless device, the UE may transmit acapability indication to a base station indicating that the UE iscapable of using antennas associated with different power classes fortransmitting uplink signals to the base station. The operations of 1415may be performed according to the methods described herein. In someexamples, aspects of the operations of 1415 may be performed by a powerclass manager as described with reference to FIGS. 6 through 9.

At 1420, the UE may identify uplink signals to transmit to the basestation using at least one antenna of the set of local antennas of thefirst device associated with the first power class or of the set ofauxiliary antennas of the second device associated with the second powerclass. In some examples, the UE may generate a representation (e.g., IQsamples) of uplink signals for transmission to a base station viaauxiliary antennas at the wireless device. The operations of 1420 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1420 may be performed by an uplink signalmanager as described with reference to FIGS. 6 through 9.

At 1425, the UE may transmit the uplink signals to the base station viathe at least one antenna. The UE 115 may transmit the uplink signalsusing at least one antenna from the set of local antennas at a firsttransmit power determined in accordance with a first maximum powerreduction, a first maximum allowed power, a first transmit power controlcommand, or combinations thereof. The operations of 1425 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1425 may be performed by an uplink signalmanager as described with reference to FIGS. 6 through 9.

FIG. 15 shows a flowchart illustrating a method 1500 that supports powercontrol for wireless device cooperative transmission schemes inaccordance with aspects of the present disclosure. The operations ofmethod 1500 may be implemented by a base station 105 or its componentsas described herein. For example, the operations of method 1500 may beperformed by a communications manager as described with reference toFIGS. 10 through 13. In some examples, a base station may execute a setof instructions to control the functional elements of the base stationto perform the functions described below. Additionally, oralternatively, a base station may perform aspects of the functionsdescribed below using special-purpose hardware.

At 1505, the base station may communicate with a first device over afirst communication link, the first device using a set of local antennasassociated with a first power class. The communication may involve anexchange of data between the UE and the base station. The operations of1505 may be performed according to the methods described herein. In someexamples, aspects of the operations of 1505 may be performed by a powerclass manager as described with reference to FIGS. 10 through 13.

At 1510, the base station may receive, from the first device, anindication of a second power class associated with a set of auxiliaryantennas of a second device, where the first device is in communicationwith the second device over a second communication link. Afterdetermining auxiliary antennas of a wireless device, the UE may transmita capability indication to a base station indicating that the UE iscapable of using antennas associated with different power classes fortransmitting uplink signals to the base station. The operations of 1510may be performed according to the methods described herein. In someexamples, aspects of the operations of 1510 may be performed by a powerclass manager as described with reference to FIGS. 10 through 13.

At 1515, the base station may transmit, to the first device, a controlmessage indicating a first power for uplink transmissions via the set oflocal antennas of the first device and a second power for uplinktransmissions via the set of auxiliary antennas of the second device. AUE may receive a control message (e.g., DCI message, RRC message, MAC CEmessage) from the base station indicating a first transmit powerconfiguration (e.g., maximum power reduction indicator, maximum allowedpower) for transmitting uplink signals via the set of local antennas anda second transmit power configuration for transmitting uplink signalsvia the set of auxiliary antennas. The operations of 1515 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1515 may be performed by a transmit powermanager as described with reference to FIGS. 10 through 13.

At 1520, the base station may receive first uplink signals from thefirst device transmitted with the first power and second uplink signalsfrom the second device transmitted with the second power based on thetransmitting. The UE 115 may transmit the uplink signals using at leastone antenna from the set of local antennas at a first transmit powerdetermined in accordance with a first maximum power reduction, a firstmaximum allowed power, a first transmit power control command, orcombinations thereof. The operations of 1520 may be performed accordingto the methods described herein. In some examples, aspects of theoperations of 1520 may be performed by an uplink signal manager asdescribed with reference to FIGS. 10 through 13.

It should be noted that the methods described herein describe possibleimplementations, and that the operations and the steps may be rearrangedor otherwise modified and that other implementations are possible.Further, aspects from two or more of the methods may be combined.

Techniques described herein may be used for various wirelesscommunications systems such as code division multiple access (CDMA),time division multiple access (TDMA), frequency division multiple access(FDMA), orthogonal frequency division multiple access (OFDMA), singlecarrier frequency division multiple access (SC-FDMA), and other systems.A CDMA system may implement a radio technology such as CDMA2000,Universal Terrestrial Radio Access (UTRA), etc. CDMA2000 covers IS-2000,IS-95, and IS-856 standards. IS-2000 Releases may be commonly referredto as CDMA2000 1×, 1×, etc. IS-856 (TIA-856) is commonly referred to asCDMA2000 1×EV-DO, High Rate Packet Data (HRPD), etc. UTRA includesWideband CDMA (WCDMA) and other variants of CDMA. A TDMA system mayimplement a radio technology such as Global System for MobileCommunications (GSM).

An OFDMA system may implement a radio technology such as Ultra MobileBroadband (UMB), Evolved UTRA (E-UTRA), Institute of Electrical andElectronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE802.20, Flash-OFDM, etc. UTRA and E-UTRA are part of Universal MobileTelecommunications System (UMTS). LTE, LTE-A, and LTE-A Pro are releasesof UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, LTE-A Pro, NR,and GSM are described in documents from the organization named “3rdGeneration Partnership Project” (3GPP). CDMA2000 and UMB are describedin documents from an organization named “3rd Generation PartnershipProject 2” (3GPP2). The techniques described herein may be used for thesystems and radio technologies mentioned herein as well as other systemsand radio technologies. While aspects of an LTE, LTE-A, LTE-A Pro, or NRsystem may be described for purposes of example, and LTE, LTE-A, LTE-APro, or NR terminology may be used in much of the description, thetechniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro,or NR applications.

A macro cell generally covers a relatively large geographic area (e.g.,several kilometers in radius) and may allow unrestricted access by UEswith service subscriptions with the network provider. A small cell maybe associated with a lower-powered base station, as compared with amacro cell, and a small cell may operate in the same or different (e.g.,licensed, unlicensed, etc.) frequency bands as macro cells. Small cellsmay include pico cells, femto cells, and micro cells according tovarious examples. A pico cell, for example, may cover a small geographicarea and may allow unrestricted access by UEs with service subscriptionswith the network provider. A femto cell may also cover a smallgeographic area (e.g., a home) and may provide restricted access by UEshaving an association with the femto cell (e.g., UEs in a closedsubscriber group (CSG), UEs for users in the home, and the like). An eNBfor a macro cell may be referred to as a macro eNB. An eNB for a smallcell may be referred to as a small cell eNB, a pico eNB, a femto eNB, ora home eNB. An eNB may support one or multiple (e.g., two, three, four,and the like) cells, and may also support communications using one ormultiple component carriers.

The wireless communications systems described herein may supportsynchronous or asynchronous operation. For synchronous operation, thebase stations may have similar frame timing, and transmissions fromdifferent base stations may be approximately aligned in time. Forasynchronous operation, the base stations may have different frametiming, and transmissions from different base stations may not bealigned in time. The techniques described herein may be used for eithersynchronous or asynchronous operations.

Information and signals described herein may be represented using any ofa variety of different technologies and techniques. For example, data,instructions, commands, information, signals, bits, symbols, and chipsthat may be referenced throughout the description may be represented byvoltages, currents, electromagnetic waves, magnetic fields or particles,optical fields or particles, or any combination thereof.

The various illustrative blocks and modules described in connection withthe disclosure herein may be implemented or performed with ageneral-purpose processor, a DSP, an ASIC, an FPGA, or otherprogrammable logic device, discrete gate or transistor logic, discretehardware components, or any combination thereof designed to perform thefunctions described herein. A general-purpose processor may be amicroprocessor, but in the alternative, the processor may be anyconventional processor, controller, microcontroller, or state machine. Aprocessor may also be implemented as a combination of computing devices(e.g., a combination of a DSP and a microprocessor, multiplemicroprocessors, one or more microprocessors in conjunction with a DSPcore, or any other such configuration).

The functions described herein may be implemented in hardware, softwareexecuted by a processor, firmware, or any combination thereof. Ifimplemented in software executed by a processor, the functions may bestored on or transmitted over as one or more instructions or code on acomputer-readable medium. Other examples and implementations are withinthe scope of the disclosure and appended claims. For example, due to thenature of software, functions described herein can be implemented usingsoftware executed by a processor, hardware, firmware, hardwiring, orcombinations of any of these. Features implementing functions may alsobe physically located at various positions, including being distributedsuch that portions of functions are implemented at different physicallocations.

Computer-readable media includes both non-transitory computer storagemedia and communication media including any medium that facilitatestransfer of a computer program from one place to another. Anon-transitory storage medium may be any available medium that can beaccessed by a general purpose or special purpose computer. By way ofexample, and not limitation, non-transitory computer-readable media mayinclude random-access memory (RAM), read-only memory (ROM), electricallyerasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROMor other optical disk storage, magnetic disk storage or other magneticstorage devices, or any other non-transitory medium that can be used tocarry or store desired program code means in the form of instructions ordata structures and that can be accessed by a general-purpose orspecial-purpose computer, or a general-purpose or special-purposeprocessor. Also, any connection is properly termed a computer-readablemedium. For example, if the software is transmitted from a website,server, or other remote source using a coaxial cable, fiber optic cable,twisted pair, digital subscriber line (DSL), or wireless technologiessuch as infrared, radio, and microwave, then the coaxial cable, fiberoptic cable, twisted pair, DSL, or wireless technologies such asinfrared, radio, and microwave are included in the definition of medium.Disk and disc, as used herein, include CD, laser disc, optical disc,digital versatile disc (DVD), floppy disk and Blu-ray disc where disksusually reproduce data magnetically, while discs reproduce dataoptically with lasers. Combinations of the above are also includedwithin the scope of computer-readable media.

As used herein, including in the claims, “or” as used in a list of items(e.g., a list of items prefaced by a phrase such as “at least one of” or“one or more of”) indicates an inclusive list such that, for example, alist of at least one of A, B, or C means A or B or C or AB or AC or BCor ABC (i.e., A and B and C). Also, as used herein, the phrase “basedon” shall not be construed as a reference to a closed set of conditions.For example, an exemplary step that is described as “based on conditionA” may be based on both a condition A and a condition B withoutdeparting from the scope of the present disclosure. In other words, asused herein, the phrase “based on” shall be construed in the same manneras the phrase “based at least in part on.”

In the appended figures, similar components or features may have thesame reference label. Further, various components of the same type maybe distinguished by following the reference label by a dash and a secondlabel that distinguishes among the similar components. If just the firstreference label is used in the specification, the description isapplicable to any one of the similar components having the same firstreference label irrespective of the second reference label, or othersubsequent reference label.

The description set forth herein, in connection with the appendeddrawings, describes example configurations and does not represent allthe examples that may be implemented or that are within the scope of theclaims. The term “exemplary” used herein means “serving as an example,instance, or illustration,” and not “preferred” or “advantageous overother examples.” The detailed description includes specific details forthe purpose of providing an understanding of the described techniques.These techniques, however, may be practiced without these specificdetails. In some instances, well-known structures and devices are shownin block diagram form in order to avoid obscuring the concepts of thedescribed examples.

The description herein is provided to enable a person skilled in the artto make or use the disclosure. Various modifications to the disclosurewill be readily apparent to those skilled in the art, and the genericprinciples defined herein may be applied to other variations withoutdeparting from the scope of the disclosure. Thus, the disclosure is notlimited to the examples and designs described herein, but is to beaccorded the broadest scope consistent with the principles and novelfeatures disclosed herein.

What is claimed is:
 1. A method for wireless communication at a firstdevice, comprising: communicating with a base station over a firstwireless communication link using a set of local antennas associatedwith a first power class; identifying a set of auxiliary antennas of asecond device associated with a second power class for transmittinguplink signals to the base station, wherein the first device is incommunication with the second device over a second wirelesscommunication link; identifying uplink signals to transmit to the basestation using at least one antenna of the set of local antennas of thefirst device associated with the first power class or of the set ofauxiliary antennas of the second device associated with the second powerclass; and transmitting the uplink signals to the base station via theat least one antenna.
 2. The method of claim 1, further comprising:transmitting, based at least in part on identifying the set of auxiliaryantennas of the second device, an indication of the second power classfor the set of auxiliary antennas to the base station.
 3. The method ofclaim 1, further comprising: receiving, from the base station, a firstpower control command associated with transmitting the uplink signalsvia the set of local antennas of the first device and a second powercontrol command associated with transmitting the uplink signals via theset of auxiliary antennas of the second device.
 4. The method of claim3, wherein transmitting the uplink signals comprises: transmitting afirst component signal of the uplink signals to the base station via theat least one antenna of the set of local antennas of the first devicebased at least in part on a first power control loop associated with theset of local antennas of the first device and the first power controlcommand; and transmitting a second component signal of the uplinksignals to the base station via the at least one antenna of the set ofauxiliary antennas of the second device based at least in part on asecond power control loop associated with the set of auxiliary antennasof the second device and the second power control command.
 5. The methodof claim 3, further comprising: transmitting, to the second device overthe second wireless communication link, a control message indicating atransmit power for transmitting the uplink signals via the set ofauxiliary antennas of the second device.
 6. The method of claim 1,wherein transmitting the uplink signals via the at least one antenna ofthe set of auxiliary antennas of the second device comprises: sendingin-phase and quadrature samples of the uplink signals to the seconddevice for transmission to the base station via the at least one antennaof the set of auxiliary antennas of the second device.
 7. The method ofclaim 1, wherein: the first power class is applied to antenna ports ofthe first device associated with the set of local antennas; and thesecond power class is applied to antenna ports of the second deviceassociated with the set of auxiliary antennas.
 8. The method of claim 1,wherein: the first power class is applied to a first set of carriersallocated for uplink transmissions from the first device using the setof local antennas; and the second power class is applied to a second setof carriers allocated for uplink transmissions from the second deviceusing the set of auxiliary antennas.
 9. The method of claim 1, furthercomprising: receiving radio resource control (RRC) signaling indicatinga first maximum power reduction and a first maximum allowed power(PEMAX) associated with the first power class and a second maximum powerreduction and a second maximum allowed power (PEMAX) associated with thesecond power class.
 10. The method of claim 1, wherein the secondwireless communication link comprises a Bluetooth link, a Wi-Fi link, ora sidelink.
 11. A method for wireless communication at a base station,comprising: communicating with a first device over a first wirelesscommunication link, the first device using a set of local antennasassociated with a first power class; transmitting, to the first device,a control message indicating a first power for uplink transmissions viathe set of local antennas of the first device and a second power foruplink transmissions via a set of auxiliary antennas of a second device,wherein the first device is in communication with the second device overa second wireless communication link; and receiving first uplink signalsfrom the first device transmitted with the first power and second uplinksignals from the second device transmitted with the second power basedat least in part on the transmitting.
 12. The method of claim 11,further comprising: receiving, from the first device, an indication of asecond power class associated with the set of auxiliary antennas of thesecond device.
 13. The method of claim 12, wherein: the first powerclass is applied to antenna ports of the first device associated withthe set of local antennas; and the second power class is applied toantenna ports of the second device associated with the set of auxiliaryantennas.
 14. The method of claim 13, further comprising: identifying afirst antenna port index associated with the first uplink signals and asecond antenna port index associated with the second uplink signals; anddetermining that the first uplink signals are from the first devicebased at least in part on the first antenna port index and the seconduplink signals are from the second device based at least in part on thesecond antenna port index.
 15. The method of claim 12, wherein: thefirst power class is applied to a first set of carriers allocated foruplink transmissions from the first device using the set of localantennas; and the second power class is applied to a second set ofcarriers allocated for uplink transmissions from the second device usingthe set of auxiliary antennas.
 16. The method of claim 15, furthercomprising: identifying that the first uplink signals are received onthe first set of carriers and the second uplink signals are received onthe second set of carriers; and determining that the first uplinksignals are from the first device based at least in part on the firstuplink signals being received on the first set of carriers and thesecond uplink signals are from the second device based at least in parton the second uplink signals being received on the second set ofcarriers.
 17. The method of claim 12, further comprising: transmittingradio resource control (RRC) signaling indicating a first maximum powerreduction and a first maximum allowed power (PEMAX) associated with thefirst power class and a second maximum power reduction and a secondmaximum allowed power (PEMAX) associated with the second power class.18. The method of claim 11, wherein the second wireless communicationlink comprises a Bluetooth link, a Wi-Fi link, or a sidelink.
 19. Anapparatus for wireless communication at a first device, comprising: aprocessor, memory coupled with the processor; and instructions stored inthe memory and executable by the processor to cause the apparatus to:communicate with a base station over a first wireless communication linkusing a set of local antennas associated with a first power class;identify a set of auxiliary antennas of a second device associated witha second power class for transmitting uplink signals to the basestation, wherein the first device is in communication with the seconddevice over a second wireless communication link; identify uplinksignals to transmit to the base station using at least one antenna ofthe set of local antennas of the first device associated with the firstpower class or of the set of auxiliary antennas of the second deviceassociated with the second power class; and transmit the uplink signalsto the base station via the at least one antenna.
 20. The apparatus ofclaim 19, wherein the instructions are further executable by theprocessor to cause the apparatus to: transmit, based at least in part onidentifying the set of auxiliary antennas of the second device, anindication of the second power class for the set of auxiliary antennasto the base station.
 21. The apparatus of claim 19, wherein theinstructions are further executable by the processor to cause theapparatus to: receive, from the base station, a first power controlcommand associated with transmitting the uplink signals via the set oflocal antennas of the first device and a second power control commandassociated with transmitting the uplink signals via the set of auxiliaryantennas of the second device; transmit a first component signal of theuplink signals to the base station via the at least one antenna of theset of local antennas of the first device based at least in part on afirst power control loop associated with the set of local antennas ofthe first device and the first power control command; and transmit asecond component signal of the uplink signals to the base station viathe at least one antenna of the set of auxiliary antennas of the seconddevice based at least in part on a second power control loop associatedwith the set of auxiliary antennas of the second device and the secondpower control command.
 22. The apparatus of claim 19, wherein: the firstpower class is applied to antenna ports of the first device associatedwith the set of local antennas; and the second power class is applied toantenna ports of the second device associated with the set of auxiliaryantennas.
 23. The apparatus of claim 19, wherein: the first power classis applied to a first set of carriers allocated for uplink transmissionsfrom the first device using the set of local antennas; and the secondpower class is applied to a second set of carriers allocated for uplinktransmissions from the second device using the set of auxiliaryantennas.
 24. The apparatus of claim 19, wherein the instructions arefurther executable by the processor to cause the apparatus to: receiveradio resource control (RRC) signaling indicating a first maximum powerreduction and a first maximum allowed power (PEMAX) associated with thefirst power class and a second maximum power reduction and a secondmaximum allowed power (PEMAX) associated with the second power class.25. An apparatus for wireless communication at a base station,comprising: a processor, memory coupled with the processor; andinstructions stored in the memory and executable by the processor tocause the apparatus to: communicate with a first device over a firstwireless communication link, the first device using a set of localantennas associated with a first power class; transmit, to the firstdevice, a control message indicating a first power for uplinktransmissions via the set of local antennas of the first device and asecond power for uplink transmissions via a set of auxiliary antennas ofa second device, wherein the first device is in communication with thesecond device over a second wireless communication link; and receivefirst uplink signals from the first device transmitted with the firstpower and second uplink signals from the second device transmitted withthe second power based at least in part on the transmitting.
 26. Theapparatus of claim 25, wherein the instructions are further executableby the processor to cause the apparatus to: receive, from the firstdevice, an indication of a second power class associated with the set ofauxiliary antennas of the second device.
 27. The apparatus of claim 26,wherein: the first power class is applied to antenna ports of the firstdevice associated with the set of local antennas; and the second powerclass is applied to antenna ports of the second device associated withthe set of auxiliary antennas.
 28. The apparatus of claim 27, whereinthe instructions are further executable by the processor to cause theapparatus to: identify a first antenna port index associated with thefirst uplink signals and a second antenna port index associated with thesecond uplink signals; and determine that the first uplink signals arefrom the first device based at least in part on the first antenna portindex and the second uplink signals are from the second device based atleast in part on the second antenna port index.
 29. The apparatus ofclaim 26, wherein: the first power class is applied to a first set ofcarriers allocated for uplink transmissions from the first device usingthe set of local antennas; and the second power class is applied to asecond set of carriers allocated for uplink transmissions from thesecond device using the set of auxiliary antennas.
 30. The apparatus ofclaim 29, wherein the instructions are further executable by theprocessor to cause the apparatus to: identify that the first uplinksignals are received on the first set of carriers and the second uplinksignals are received on the second set of carriers; and determine thatthe first uplink signals are from the first device based at least inpart on the first uplink signals being received on the first set ofcarriers and the second uplink signals are from the second device basedat least in part on the second uplink signals being received on thesecond set of carriers.